Company lists · Data refreshed September 2026
Top 25 Government contract security companies based in the United Kingdom
RevenueBase identified 266 company matches for government contract security companies associated with the United Kingdom as of September 2026 and tracks 3,436 professional contacts across them, including 293 with verified work emails and 181 with mobile numbers. London is the largest hub.
This list covers company matches for government contract security companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 3, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest government contract security companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 325 contacts → | ||||
Exact match “Established in 1993, with commitment to our customers and staff alongside a strong ethos and standards driven approach, Regency Security is now the largest provider of door…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 2 | 125 contacts → | ||||
Exact match “Vespasian Security was formed in February 2006.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 3 | 124 contacts → | ||||
Exact match “About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 4 | 91 contacts → | ||||
Exact match “The multi award winning Octavian is one of the world's fastest growing, most forward thinking security and facilities management led businesses.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 5 | 90 contacts → | ||||
Exact match “For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 6 | 85 contacts → | ||||
Exact match “At Servoca Secure Solutions, we take great pride in delivering a multi-service security business; offering a range of complementary products and services to both the public and…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 7 | 70 contacts → | ||||
Exact match “Northern Security Ltd is a leading guarding, alarm response and electronic security business operating throughout the North of England and South West Scotland.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 8 | 64 contacts → | ||||
Exact match “City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 9 | 62 contacts → | ||||
Exact match “Black Diamond Security - Safeguarding Your World.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 10 | 58 contacts → | ||||
Exact match “Sentinel Group Security is a fast growing provider of all aspects of security personnel and manned security services operating across the United Kingdom.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 11 | 44 contacts → | ||||
Exact match “Design, install and maintain CCTV Systems Intruder Systems Access Control Manned Security Guarding Event Stewarding Construction Cleaning Commercial Cleaning Builders & Sparkle…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 12 | 43 contacts → | ||||
Exact match “All in Black are an accredited security solutions provider with over 20 years’ experience at the highest level across the UK.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 13 | 43 contacts → | ||||
Exact match “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 14 | 40 contacts → | ||||
Exact match “4 Site Security have specialised in providing professional security services to clients throughout the North of England for over 23 Years.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 15 | 33 contacts → | ||||
Exact match “At Leisure Guard Security, we provide a wide range of security services to private individuals and corporate businesses alike.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 16 | 32 contacts → | ||||
Exact match “Oak Security Services was founded in July 2015 and is now one of the fastest growing security companies in the UK.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 17 | 32 contacts → | ||||
Exact match “Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 18 | 32 contacts → | ||||
Exact match “At Samson Security Fire & Facilities, we provide integrated security, fire protection, and facilities management solutions designed to keep people, property, and operations safe…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 19 | 31 contacts → | ||||
Exact match “At Herongrange we pride ourselves in delivering our products and services to the highest possible standards.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 20 | 31 contacts → | ||||
Exact match “Systematic Security deliver static manned guarding, mobile patrols, open and lock ups, keyholding and emergency response requirements as well as Vacant Property inspections to a…” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 21 | 27 contacts → | ||||
Exact match “Eboracum was founded in 2011 and established in York by local-lad and former North Yorkshire Police Constable Carl Nickson.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 22 | 25 contacts → | ||||
Exact match “We deliver professional, accredited security services that protect people, property, and organisations across the UK.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 23 | 24 contacts → | ||||
Exact match “Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 24 | 21 contacts → | ||||
Exact match “Classic Security was founded in 1947 by Fredrick Townsley - the father of our chairman and the grandfather of our MD.” Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
| 25 | 20 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 3, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “government contract security companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 266 government contract security companies based in the United Kingdom
See the full list, filter by size, metro and specialty, and access 293 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Government contract security companies based in the United Kingdom at a glance
As of Sep 3, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United Kingdom whose business descriptions match “government contract security companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 293 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 3, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Government contract security companies by metro
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “government contract security companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many government contract security companies are there based in the United Kingdom?
RevenueBase identified 266 company matches for government contract security companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Regency Security tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most government contract security companies?
London leads with 68 company records, followed by Manchester (12) and Birmingham (12).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 293 professional contacts with verified work emails tracked across these 266 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 3, 2026.
Ready to reach these companies? Verified emails and direct dials for all 266 government contract security companies based in the United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Government contract security companies by geography
- Government contract security companies based in the United States
- Government contract security companies based in Brazil
- Government contract security companies based in France
- Government contract security companies based in Canada
- Government contract security companies based in Italy
- Government contract security companies based in Germany
- Government contract security companies based in Australia
- Government contract security companies based in South Africa
- Government contract security companies based in Mexico
- Government contract security companies based in the Netherlands
- Government contract security companies based in Argentina
- Government contract security companies based in Spain
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Government contract security companies based in the United States
- Government contract security companies based in Brazil
- Government contract security companies based in France
- Government contract security companies based in Canada
- Government contract security companies based in Italy
- Government contract security companies based in Germany
Company intelligence · public preview
Top 25 government contract security companies based in the United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 266 matching company records for government contract security companies based in the United Kingdom, with 3,436 tracked contacts and 293 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 3, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 government contract security companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Regency Securityregencysecurity.co.ukHQ: Braintree, United KingdomReported employees: 1,001-5,000 | Braintree, United Kingdom | 1,001-5,000 | Exact match | 325 contacts → |
“Established in 1993, with commitment to our customers and staff alongside a strong ethos and standards driven approach, Regency Security is now the largest provider of door…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Vespasian Securityvespasiansecurity.co.ukHQ: Portsmouth, United KingdomReported employees: 201-500 | Portsmouth, United Kingdom | 201-500 | Exact match | 125 contacts → |
“Vespasian Security was formed in February 2006.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Kingdom Security Serviceskingdom.co.ukHQ: Newton-Le-Willows, United KingdomReported employees: 5,001-10,000 | Newton-Le-Willows, United Kingdom | 5,001-10,000 | Exact match | 124 contacts → |
“About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Octavian Securityoctaviangr.comHQ: Bingham, United KingdomReported employees: 201-500 | Bingham, United Kingdom | 201-500 | Exact match | 91 contacts → |
“The multi award winning Octavian is one of the world's fastest growing, most forward thinking security and facilities management led businesses.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  K4 Security - K4 Groupk4security.co.ukHQ: Hounslow, United KingdomReported employees: 201-500 | Hounslow, United Kingdom | 201-500 | Exact match | 90 contacts → |
“For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Servoca Secure Solutions Limitedservoca-secure.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 85 contacts → |
“At Servoca Secure Solutions, we take great pride in delivering a multi-service security business; offering a range of complementary products and services to both the public and…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Northern Security LTDnorthernsecurityltd.co.ukHQ: Carlisle, United KingdomReported employees: 201-500 | Carlisle, United Kingdom | 201-500 | Exact match | 70 contacts → |
“Northern Security Ltd is a leading guarding, alarm response and electronic security business operating throughout the North of England and South West Scotland.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  City Security Services Part Of City Group Securitycitysecurity.org.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 64 contacts → |
“City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Black Diamond Securityblackdiamondsecurity.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 62 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Sentinel Group Securitysgs-ltd.comHQ: Loughton, United KingdomReported employees: 201-500 | Loughton, United Kingdom | 201-500 | Exact match | 58 contacts → |
“Sentinel Group Security is a fast growing provider of all aspects of security personnel and manned security services operating across the United Kingdom.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Phoenix FMSphoenix-eye.co.ukHQ: Newcastle Upon Tyne, United KingdomReported employees: 201-500 | Newcastle Upon Tyne, United Kingdom | 201-500 | Exact match | 44 contacts → |
“Design, install and maintain CCTV Systems Intruder Systems Access Control Manned Security Guarding Event Stewarding Construction Cleaning Commercial Cleaning Builders & Sparkle…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  AIB Groupaib-group.co.ukHQ: Park Bletchley, United KingdomReported employees: 201-500 | Park Bletchley, United Kingdom | 201-500 | Exact match | 43 contacts → |
“All in Black are an accredited security solutions provider with over 20 years’ experience at the highest level across the UK.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Ak9 Security And FM Solutions LTDak9security.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 43 contacts → |
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  4 Site Security4sitesecurity.co.ukHQ: Leeds, United KingdomReported employees: 51-200 | Leeds, United Kingdom | 51-200 | Exact match | 40 contacts → |
“4 Site Security have specialised in providing professional security services to clients throughout the North of England for over 23 Years.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Leisure Guard Security UK LTDleisureguardsecurity.co.ukHQ: Manchester, United KingdomReported employees: 201-500 | Manchester, United Kingdom | 201-500 | Exact match | 33 contacts → |
“At Leisure Guard Security, we provide a wide range of security services to private individuals and corporate businesses alike.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  OAK Security Services Limitedoaksecurityservices.co.ukHQ: Ilford, United KingdomReported employees: 201-500 | Ilford, United Kingdom | 201-500 | Exact match | 32 contacts → |
“Oak Security Services was founded in July 2015 and is now one of the fastest growing security companies in the UK.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Prosec UKprosec.co.ukHQ: Doncaster, United KingdomReported employees: 51-200 | Doncaster, United Kingdom | 51-200 | Exact match | 32 contacts → |
“Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Samson Security Fire & Facilitiessamsonsecurity.co.ukHQ: Liverpool, United KingdomReported employees: 51-200 | Liverpool, United Kingdom | 51-200 | Exact match | 32 contacts → |
“At Samson Security Fire & Facilities, we provide integrated security, fire protection, and facilities management solutions designed to keep people, property, and operations safe…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Herongrange Group Limitedherongrange.comHQ: Burton Upon Trent, United KingdomReported employees: 201-500 | Burton Upon Trent, United Kingdom | 201-500 | Exact match | 31 contacts → |
“At Herongrange we pride ourselves in delivering our products and services to the highest possible standards.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Systematic Security LTDsystematicsecurity.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 31 contacts → |
“Systematic Security deliver static manned guarding, mobile patrols, open and lock ups, keyholding and emergency response requirements as well as Vacant Property inspections to a…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Eboracumeboracumuk.comHQ: York, United KingdomReported employees: 201-500 | York, United Kingdom | 201-500 | Exact match | 27 contacts → |
“Eboracum was founded in 2011 and established in York by local-lad and former North Yorkshire Police Constable Carl Nickson.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Glevum Securityglevum-security.co.ukHQ: Gloucester, United KingdomReported employees: 51-200 | Gloucester, United Kingdom | 51-200 | Exact match | 25 contacts → |
“We deliver professional, accredited security services that protect people, property, and organisations across the UK.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Close Protection Security NEcloseprotectionsecurityltd.comHQ: Darlington, United KingdomReported employees: 51-200 | Darlington, United Kingdom | 51-200 | Exact match | 24 contacts → |
“Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Classic Services Group LTDclassicservicesgroup.co.ukHQ: Crawley, United KingdomReported employees: 51-200 | Crawley, United Kingdom | 51-200 | Exact match | 21 contacts → |
“Classic Security was founded in 1947 by Fredrick Townsley - the father of our chairman and the grandfather of our MD.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Secured Security Solutions Limitedsecuredsecuritysolutions.com HQ: Ilford, United KingdomReported employees: 51-200 | Ilford, United Kingdom | 51-200 | Exact match | 20 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 266 company matches
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Government contract security companies: dataset insights
September 3, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
261 records in the displayed employee bands.
5 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 3, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Government contract security companies by metro
Questions about this company list
What does Exact match mean for government contract security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many government contract security companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 266 matching company records, 3,436 tracked contacts and 293 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 3, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Government contract security companies by geography
- Government contract security companies based in the United States
- Government contract security companies based in Brazil
- Government contract security companies based in France
- Government contract security companies based in Canada
- Government contract security companies based in Italy
- Government contract security companies based in Germany
- Government contract security companies based in Australia
- Government contract security companies based in South Africa
- Government contract security companies based in Mexico
- Government contract security companies based in the Netherlands
- Government contract security companies based in Argentina
- Government contract security companies based in Spain
Cite this list
RevenueBase Data Team. Top 25 government contract security companies based in the United Kingdom. Snapshot: September 3, 2026. https://revenuebase.ai/companies/government-contract-security-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Government contract security companies based in the United States
- Government contract security companies based in Brazil
- Government contract security companies based in France
- Government contract security companies based in Canada
- Government contract security companies based in Italy
- Government contract security companies based in Germany
Company intelligence · public preview
Top 25 government contract security companies based in the United Kingdom
RevenueBase records 266 matching company records for government contract security companies based in the United Kingdom, with 3,436 tracked contacts and 293 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 3, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 government contract security companies based in the United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Regency Securityregencysecurity.co.uk HQ: Braintree, United KingdomReported employees: 1,001-5,000 | Braintree, United Kingdom | 1,001-5,000 | Exact match | 325 contacts → |
“Established in 1993, with commitment to our customers and staff alongside a strong ethos and standards driven approach, Regency Security is now the largest provider of door…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Vespasian Securityvespasiansecurity.co.uk HQ: Portsmouth, United KingdomReported employees: 201-500 | Portsmouth, United Kingdom | 201-500 | Exact match | 125 contacts → |
“Vespasian Security was formed in February 2006.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Kingdom Security Serviceskingdom.co.uk HQ: Newton-Le-Willows, United KingdomReported employees: 5,001-10,000 | Newton-Le-Willows, United Kingdom | 5,001-10,000 | Exact match | 124 contacts → |
“About Kingdom Security Established in March 1993, Kingdom Security is a leading UK security provider delivering professional, fully licensed security services nationwide.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Octavian Securityoctaviangr.com HQ: Bingham, United KingdomReported employees: 201-500 | Bingham, United Kingdom | 201-500 | Exact match | 91 contacts → |
“The multi award winning Octavian is one of the world's fastest growing, most forward thinking security and facilities management led businesses.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | K4 Security - K4 Groupk4security.co.uk HQ: Hounslow, United KingdomReported employees: 201-500 | Hounslow, United Kingdom | 201-500 | Exact match | 90 contacts → |
“For a better service and competitive price try K4 Security Services At K4 we offer the following: 1.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Servoca Secure Solutions Limitedservoca-secure.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 85 contacts → |
“At Servoca Secure Solutions, we take great pride in delivering a multi-service security business; offering a range of complementary products and services to both the public and…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Northern Security LTDnorthernsecurityltd.co.uk HQ: Carlisle, United KingdomReported employees: 201-500 | Carlisle, United Kingdom | 201-500 | Exact match | 70 contacts → |
“Northern Security Ltd is a leading guarding, alarm response and electronic security business operating throughout the North of England and South West Scotland.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | City Security Services Part Of City Group Securitycitysecurity.org.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 64 contacts → |
“City Security Services (CSS) have more than 25 years’ experience within the corporate security, public sector, education and social housing markets delivering manned guarding…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Black Diamond Securityblackdiamondsecurity.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 62 contacts → |
“Black Diamond Security - Safeguarding Your World.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Sentinel Group Securitysgs-ltd.com HQ: Loughton, United KingdomReported employees: 201-500 | Loughton, United Kingdom | 201-500 | Exact match | 58 contacts → |
“Sentinel Group Security is a fast growing provider of all aspects of security personnel and manned security services operating across the United Kingdom.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Phoenix FMSphoenix-eye.co.uk HQ: Newcastle Upon Tyne, United KingdomReported employees: 201-500 | Newcastle Upon Tyne, United Kingdom | 201-500 | Exact match | 44 contacts → |
“Design, install and maintain CCTV Systems Intruder Systems Access Control Manned Security Guarding Event Stewarding Construction Cleaning Commercial Cleaning Builders & Sparkle…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | AIB Groupaib-group.co.uk HQ: Park Bletchley, United KingdomReported employees: 201-500 | Park Bletchley, United Kingdom | 201-500 | Exact match | 43 contacts → |
“All in Black are an accredited security solutions provider with over 20 years’ experience at the highest level across the UK.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Ak9 Security And FM Solutions LTDak9security.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 43 contacts → |
“AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | 4 Site Security4sitesecurity.co.uk HQ: Leeds, United KingdomReported employees: 51-200 | Leeds, United Kingdom | 51-200 | Exact match | 40 contacts → |
“4 Site Security have specialised in providing professional security services to clients throughout the North of England for over 23 Years.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Leisure Guard Security UK LTDleisureguardsecurity.co.uk HQ: Manchester, United KingdomReported employees: 201-500 | Manchester, United Kingdom | 201-500 | Exact match | 33 contacts → |
“At Leisure Guard Security, we provide a wide range of security services to private individuals and corporate businesses alike.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | OAK Security Services Limitedoaksecurityservices.co.uk HQ: Ilford, United KingdomReported employees: 201-500 | Ilford, United Kingdom | 201-500 | Exact match | 32 contacts → |
“Oak Security Services was founded in July 2015 and is now one of the fastest growing security companies in the UK.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Prosec UKprosec.co.uk HQ: Doncaster, United KingdomReported employees: 51-200 | Doncaster, United Kingdom | 51-200 | Exact match | 32 contacts → |
“Security Specialists A discreet, reliable and effective service Providing highly trained professional security guards and associated round the clock security services and for over…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Samson Security Fire & Facilitiessamsonsecurity.co.uk HQ: Liverpool, United KingdomReported employees: 51-200 | Liverpool, United Kingdom | 51-200 | Exact match | 32 contacts → |
“At Samson Security Fire & Facilities, we provide integrated security, fire protection, and facilities management solutions designed to keep people, property, and operations safe…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Herongrange Group Limitedherongrange.com HQ: Burton Upon Trent, United KingdomReported employees: 201-500 | Burton Upon Trent, United Kingdom | 201-500 | Exact match | 31 contacts → |
“At Herongrange we pride ourselves in delivering our products and services to the highest possible standards.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Systematic Security LTDsystematicsecurity.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 31 contacts → |
“Systematic Security deliver static manned guarding, mobile patrols, open and lock ups, keyholding and emergency response requirements as well as Vacant Property inspections to a…” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Eboracumeboracumuk.com HQ: York, United KingdomReported employees: 201-500 | York, United Kingdom | 201-500 | Exact match | 27 contacts → |
“Eboracum was founded in 2011 and established in York by local-lad and former North Yorkshire Police Constable Carl Nickson.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Glevum Securityglevum-security.co.uk HQ: Gloucester, United KingdomReported employees: 51-200 | Gloucester, United Kingdom | 51-200 | Exact match | 25 contacts → |
“We deliver professional, accredited security services that protect people, property, and organisations across the UK.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Close Protection Security NEcloseprotectionsecurityltd.com HQ: Darlington, United KingdomReported employees: 51-200 | Darlington, United Kingdom | 51-200 | Exact match | 24 contacts → |
“Close Protection Security is an industry-leading security company, established in 2017 and based in the North East of England, created by Glenn Bartlett.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Classic Services Group LTDclassicservicesgroup.co.uk HQ: Crawley, United KingdomReported employees: 51-200 | Crawley, United Kingdom | 51-200 | Exact match | 21 contacts → |
“Classic Security was founded in 1947 by Fredrick Townsley - the father of our chairman and the grandfather of our MD.” Recorded description excerpt · September 3, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Secured Security Solutions Limitedsecuredsecuritysolutions.com HQ: Ilford, United KingdomReported employees: 51-200 | Ilford, United Kingdom | 51-200 | Exact match | 20 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 266 company matches
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Government contract security companies: dataset insights
September 3, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
261 records in the displayed employee bands.
5 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 3, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Government contract security companies by metro
Questions about this company list
What does Exact match mean for government contract security companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many government contract security companies did RevenueBase find based in the United Kingdom?
The saved snapshot records 266 matching company records, 3,436 tracked contacts and 293 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 3, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 government contract security companies based in the United Kingdom. Snapshot: September 3, 2026. https://revenuebase.ai/companies/government-contract-security-companies/united-kingdom.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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