Company lists · Data refreshed September 2026

Top 25 Government facility security installers based in the United Kingdom

Name: Government facility security installers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 706 companies tracked

RevenueBase identified 706 government facility security installers headquartered in the United Kingdom as of September 2026 and tracks 4,792 professional contacts across them, including 1,608 with verified work emails. London is the largest hub.

This list covers government facility security installers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

706Companies

4,792Contacts tracked

1,608Verified emails

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The 25 largest government facility security installers based in the United Kingdom

Ranked by team size

Top 25 of 706 government facility security installers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to government facility security installers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kings Secure Technologies	Indirect evidence	Bradford, United KingdomHQ checked Sep 28, 2026	501-1,000	326 contacts →
	Indirect evidence “Kings Secure Technologies (KST) is a high-end, enterprise-level systems integrator.” Source: RevenueBase Database · checked Sep 28, 2026
2	Total Security Protection LTD	Partial evidence	Watford, United KingdomHQ checked Sep 28, 2026	51-200	116 contacts →
	Partial evidence “TSP has a reputation for providing enterprise security solutions, as well as excellent system integration standards and exceptional aftercare support, since its founding in 1988.” Source: RevenueBase Database · checked Sep 28, 2026
3	Croma Security Solutions Group PLC Cssg	Partial evidence	Whiteley, United KingdomHQ checked Sep 28, 2026	501-1,000	87 contacts →
	Partial evidence “Croma Security Solutions Group (CSSG) began in 1970 as a family-run business in Shirley, Southampton, known as County Locksmiths.” Source: RevenueBase Database · checked Sep 28, 2026
4	Scutum UK	Partial evidence	Chertsey, United KingdomHQ checked Sep 28, 2026	201-500	87 contacts →
	Partial evidence “Scutum Fire & Security Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
5	SPY Alarms LTD	Partial evidence	Orpington, United KingdomHQ checked Sep 28, 2026	201-500	71 contacts →
	Partial evidence “Spy Alarms is probably the largest privately owned business installing security systems in the South East, started by Martin Foster after his own house was burgled and he could…” Source: RevenueBase Database · checked Sep 28, 2026
6	ABEL	Partial evidence	Leicester, United KingdomHQ checked Sep 28, 2026	51-200	70 contacts →
	Partial evidence “With over 50 years’ experience in the security industry, Abel has grown to become one of the UK’s largest privately owned providers of electronic security systems.” Source: RevenueBase Database · checked Sep 28, 2026
7	Secur-It Integrated Services LTD	Partial evidence	South Normanton, United KingdomHQ checked Sep 28, 2026	201-500	52 contacts →
	Partial evidence “Secur-it is a leading provider of security services and risk management.” Source: RevenueBase Database · checked Sep 28, 2026
8	Custom Intelligent Security	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Partial evidence “Established in Custom Intelligent Security is a technology driven ISO27001 & NSi Gold Accredited independent electronic security specialist with a proven track record of…” Source: RevenueBase Database · checked Sep 28, 2026
9	Electranet UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	49 contacts →
	Indirect evidence “Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Source: RevenueBase Database · checked Sep 28, 2026
10	Crime And Fire Defence Systems LTD	Partial evidence	Wakefield, United KingdomHQ checked Sep 28, 2026	11-50	43 contacts →
	Partial evidence “Established since 1994, Crime and Fire delivers state-of-the-art cost-effective security solutions, to the highest quality and safety standards.” Source: RevenueBase Database · checked Sep 28, 2026
11	Ak9 Security And FM Solutions LTD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	43 contacts →
	Strong evidence “AK9 Security and FM Solutions offers comprehensive security solutions for businesses, governmental organizations, and residential areas.” Source: RevenueBase Database · checked Sep 28, 2026
12	Atec Security	Partial evidence	Wolverhampton, United KingdomHQ checked Sep 28, 2026	51-200	40 contacts →
	Partial evidence “ATEC are here to make your business safe, giving you the confidence in the security of your business so It can thrive every day, now and long into the future.” Source: RevenueBase Database · checked Sep 28, 2026
13	The Chris Lewis Group	Partial evidence	Oxford, United KingdomHQ checked Sep 28, 2026	51-200	40 contacts →
	Partial evidence “Whether installing fire, security, or access control systems - or transforming your home using the latest smart technology - Chris Lewis Group can deliver exceptional solutions to…” Source: RevenueBase Database · checked Sep 28, 2026
14	Universal Security Systems LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Partial evidence “Universal Security Systems Limited is a specialist provider of installation and maintenance services for all types of security systems including Access Control, Closed Circuit…” Source: RevenueBase Database · checked Sep 28, 2026
15	Clearview Communications	Partial evidence	Chelmsford, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Since 1996, ClearView has been meeting some of the world's most demanding security requirements by utilising our experience in design, manufacture, installation and service of the…” Source: RevenueBase Database · checked Sep 28, 2026
16	Doyle Security LTD	Partial evidence	Dodworth, United KingdomHQ checked Sep 28, 2026	51-200	36 contacts →
	Partial evidence “Doyle Security Ltd is a leading provider of professional security solutions, proudly safeguarding businesses, homeowners, and their properties for over four decades.” Source: RevenueBase Database · checked Sep 28, 2026
17	Samson Security Fire & Facilities	Strong evidence	Liverpool, United KingdomHQ checked Sep 28, 2026	51-200	33 contacts →
	Strong evidence “At Samson Security Fire & Facilities, we provide integrated security, fire protection, and facilities management solutions designed to keep people, property, and operations safe…” Source: RevenueBase Database · checked Sep 28, 2026
18	Crane Communications Limited	Partial evidence	17 Heron Road, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Part of EA-RS Group, Crane Communications Ltd is one of the UK & Ireland’s leading Life Safety, Security, and Communication specialists.” Source: RevenueBase Database · checked Sep 28, 2026
19	Link Cctv Systems	Indirect evidence	Stevenage, United KingdomHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “When your CCTV system is business-critical, Link CCTV is the technology partner your business needs.” Source: RevenueBase Database · checked Sep 28, 2026
20	AGS Tech LTD	Indirect evidence	Blackburn, United KingdomHQ checked Sep 28, 2026	11-50	27 contacts →
	Indirect evidence “Established in 1993 AGS Tech are experts in installation and maintenance of: Access Control Door Entry Warden Call Automatic Powered Doors CCTV Fire Alarms Gates and Barriers.” Source: RevenueBase Database · checked Sep 28, 2026
21	Gbsg LTD	Partial evidence	Spalding, United KingdomHQ checked Sep 28, 2026	51-200	26 contacts →
	Partial evidence “For over 40 years, GBSG Ltd has been a trusted leader in commercial security and fire protection, delivering complete, end-to-end solutions that safeguard people, property, and…” Source: RevenueBase Database · checked Sep 28, 2026
22	ISA Support Services LTD	Strong evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	501-1,000	26 contacts →
	Strong evidence “Founded in 2010, I.S.A Support Services has evolved from a security company to a leading provider of integrated facility management solutions.” Source: RevenueBase Database · checked Sep 28, 2026
23	Prodoor UK Limited	Partial evidence	Chertsey, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Installation, maintenance and repair of total building and perimeter security systems, from automatic glass doors to car park barriers.” Source: RevenueBase Database · checked Sep 28, 2026
24	WRS Solutions	Partial evidence	Mexborough, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “At WRS Solutions, we specialise in delivering tailored electronic security systems that provide real peace of mind.” Source: RevenueBase Database · checked Sep 28, 2026
25	Link Integrated Security Solutions Limited	Partial evidence	Mansfield, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Security and Investigations company” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: government facility security installers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names government facility security installers.
Partial evidence: Its own public description names part of government facility security installers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government facility security installers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 706 government facility security installers based in the United Kingdom

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Government facility security installers based in the United Kingdom at a glance

As of Sep 28, 2026

33.6%Verified-email coverage

6.8Average contacts per company

1-10Median size (employees)

10.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

398

11-50

245

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 706 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among government facility security installers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “government facility security installers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names government facility security installers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among government facility security installers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,608 across the full list. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Government facility security installers by metro

Government facility security installers in London71

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names government facility security installers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many government facility security installers are there based in the United Kingdom?

RevenueBase identified 706 government facility security installers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Kings Secure Technologies, headquartered in Bradford, tops this list with the largest team on record.

Which city has the most government facility security installers?

London leads with 71 headquartered companies, followed by Manchester (12) and Leeds (10).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,608 verified decision-maker contacts tracked across these 706 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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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 Smart Search, 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.