Company lists · Data refreshed September 2026

Top 25 Fire alarm installation companies based in the United Kingdom

Name: Fire alarm installation companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,161 companies tracked

RevenueBase identified 1,161 fire alarm installation companies headquartered in the United Kingdom as of September 2026 and tracks 8,149 professional contacts across them, including 3,345 with verified work emails. London is the largest hub.

This list covers fire alarm installation companies 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 20, 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 20, 2026 86% judged on-target in blind review

1,161Companies

8,149Contacts tracked

3,345Verified emails

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The 25 largest fire alarm installation companies based in the United Kingdom

Ranked by team size

Top 25 of 1,161 fire alarm installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to fire alarm installation companies: 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	Marlowe Fire & Security	Partial evidence	Manchester, United KingdomHQ checked Sep 20, 2026	501-1,000	389 contacts →
	Partial evidence “Mitie Fire & Security is part of Mitie, the UK’s leading facilities management and professional services company, delivering integrated fire and security solutions that protect…” Source: RevenueBase Database · checked Sep 20, 2026
2	Churches Fire & Security	Partial evidence	Chandlers Ford, United KingdomHQ checked Sep 20, 2026	201-500	324 contacts →
	Partial evidence “Established in 1992, Churches Fire & Security is a nationwide company dedicated to supplying customers with the best fire safety and security services.” Source: RevenueBase Database · checked Sep 20, 2026
3	Ventro	Partial evidence	Plymouth, United KingdomHQ checked Sep 20, 2026	51-200	127 contacts →
	Partial evidence “Ventro is one of the leading specialists for Fire Safety in the UK.” Source: RevenueBase Database · checked Sep 20, 2026
4	Global Fire & Security Systems	Partial evidence	Nottingham, United KingdomHQ checked Sep 20, 2026	51-200	119 contacts →
	Partial evidence “Global Fire and Security Systems are market leaders in providing quality product solutions to services through the Fire and Security market place nationwide.” Source: RevenueBase Database · checked Sep 20, 2026
5	Senseco Systems Limited	Partial evidence	Gillingham, United KingdomHQ checked Sep 20, 2026	201-500	107 contacts →
	Partial evidence “Senseco Systems Limited is the UK’s largest and highest accredited independent fire and security company, delivering integrated life safety and security solutions across complex…” Source: RevenueBase Database · checked Sep 20, 2026
6	Argus Fire Protection Co. Limited	Partial evidence	Stourbridge, United KingdomHQ checked Sep 20, 2026	51-200	93 contacts →
	Partial evidence “Argus fire is: •The UK’s class-leading supplier of fire detection and fire protection systems •One of the largest privately owned fire protection businesses in the UK •Trusted to…” Source: RevenueBase Database · checked Sep 20, 2026
7	Ea-Rs Fire Engineering LTD	Partial evidence	Witham, United KingdomHQ checked Sep 20, 2026	51-200	85 contacts →
	Partial evidence “Incorporated in 1996, EA-RS Fire Engineering are the UK’s trusted provider of intelligent and sustainable compliant Fire Safety Systems and Services.” Source: RevenueBase Database · checked Sep 20, 2026
8	Walker Fire And Security UK	Indirect evidence	Preston, United KingdomHQ checked Sep 20, 2026	201-500	75 contacts →
	Indirect evidence “We simplify compliance and secure your business, with one trusted partner.” Source: RevenueBase Database · checked Sep 20, 2026
9	Thameside Fire Protection	Partial evidence	Basildon, United KingdomHQ checked Sep 20, 2026	51-200	60 contacts →
	Partial evidence “Thameside Fire Protection, having operated successfully since 1985, is one of the largest independent fire protection companies in the UK.” Source: RevenueBase Database · checked Sep 20, 2026
10	DFP Services	Partial evidence	Durham, United KingdomHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “DFP Services are a leading provider of Fire, Security, Communications, Mechanical and Electrical services.” Source: RevenueBase Database · checked Sep 20, 2026
11	PFS Group	Partial evidence	Southend-on-sea, United KingdomHQ checked Sep 20, 2026	51-200	56 contacts →
	Partial evidence “PFS Group Limited is an independently owned Fire & Security company that has been established since 1998.” Source: RevenueBase Database · checked Sep 20, 2026
12	Logic Fire And Security	Partial evidence	Knaresborough, United KingdomHQ checked Sep 20, 2026	11-50	55 contacts →
	Partial evidence “At Logic Fire and Security we design, supply, install, commission and maintain fire detection systems and electronic security systems throughout the UK.” Source: RevenueBase Database · checked Sep 20, 2026
13	Complete Detection Systems	Partial evidence	Leicester, United KingdomHQ checked Sep 20, 2026	51-200	51 contacts →
	Partial evidence “part of the Obsequio Group At CDS, we design, establish, maintain, and enhance fire detection and life safety systems, ensuring that the environments where people live, learn, and…” Source: RevenueBase Database · checked Sep 20, 2026
14	TP Fire & Security LTD	Partial evidence	East Harling, United KingdomHQ checked Sep 20, 2026	51-200	51 contacts →
	Partial evidence “Total Protection by Trusted Fire & Security Professionals With London, Midlands and Eastern branches, we deliver 24/7 fire and security services across the UK.” Source: RevenueBase Database · checked Sep 20, 2026
15	Sensetech Systems LTD	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	51-200	50 contacts →
	Strong evidence “Sensetech Systems Ltd is an LPS1014 Accredited independent Fire Alarm, Security and Structured Data Cabling Company.” Source: RevenueBase Database · checked Sep 20, 2026
16	Connelly Security Systems LTD CSS LTD	Strong evidence	Glasgow, United KingdomHQ checked Sep 20, 2026	51-200	49 contacts →
	Strong evidence “CSS is Scotland’s leading supplier and installer of domestic and commercial intruder and fire alarm systems.” Source: RevenueBase Database · checked Sep 20, 2026
17	A & E Fire And Security	Partial evidence	Staverton, United KingdomHQ checked Sep 20, 2026	51-200	47 contacts →
	Partial evidence “A&E Fire & Security was established in 1965.” Source: RevenueBase Database · checked Sep 20, 2026
18	Fixatex LTD	Partial evidence	Hertford, United KingdomHQ checked Sep 20, 2026	51-200	46 contacts →
	Partial evidence “Electrical & Fire Protection Services, Domestic & Commercial.” Source: RevenueBase Database · checked Sep 20, 2026
19	Jackson Fire & Security UK LTD	Indirect evidence	Mold, United KingdomHQ checked Sep 20, 2026	51-200	43 contacts →
	Indirect evidence “We protect your people and property 24/7.” Source: RevenueBase Database · checked Sep 20, 2026
20	Solid State Security LTD	Partial evidence	Hilldale, United KingdomHQ checked Sep 20, 2026	11-50	40 contacts →
	Partial evidence “We are one of the UK’s leading specialist electrical contracting companies with over 35 years' experience in the design, supply, installation, commissioning and maintenance of…” Source: RevenueBase Database · checked Sep 20, 2026
21	Tecserv UK LTD	Strong evidence	Nottingham, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Strong evidence “Founded in 2001, Tecserv UK is a highly successful fire protection, alarm and CCTV installation and maintenance company.” Source: RevenueBase Database · checked Sep 20, 2026
22	Technifire Solutions Limited	Partial evidence	Rainham, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Partial evidence “TechniFire Solutions Ltd are a truly independent fire life safety and security specialist service provider holding all statutory compliance certification, quality assurance and…” Source: RevenueBase Database · checked Sep 20, 2026
23	WFP Fire & Security	Indirect evidence	Stock, United KingdomHQ checked Sep 20, 2026	11-50	38 contacts →
	Indirect evidence “Tired of poor service?” Source: RevenueBase Database · checked Sep 20, 2026
24	Surefire Services Limited	Strong evidence	High Wycombe, United KingdomHQ checked Sep 20, 2026	11-50	37 contacts →
	Strong evidence “Part of EA-RS Group, Surefire Services are leaders in the high-quality design, engineering, installation, and maintenance of Fire Protection Systems.” Source: RevenueBase Database · checked Sep 20, 2026
25	Rosse Systems	Partial evidence	Shipley, United KingdomHQ checked Sep 20, 2026	11-50	36 contacts →
	Partial evidence “Rosse Systems specialises in Active Fire and Security Systems.” Source: RevenueBase Database · checked Sep 20, 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: fire alarm installation companies. 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 fire alarm installation companies.
Partial evidence: Its own public description names part of fire alarm installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name fire alarm installation companies. 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 1,161 fire alarm installation companies based in the United Kingdom

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Fire alarm installation companies based in the United Kingdom at a glance

As of Sep 20, 2026

41.0%Verified-email coverage

7.0Average contacts per company

1-10Median size (employees)

8.5%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

669

11-50

390

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 1,161 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 fire alarm installation companies, 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 “fire alarm installation companies”. 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 fire alarm installation companies), 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 fire alarm installation companies, 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, 3,345 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 20, 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.

Fire alarm installation companies by metro

Fire alarm installation companies in London99

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 fire alarm installation companies, 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 fire alarm installation companies are there based in the United Kingdom?

RevenueBase identified 1,161 fire alarm installation companies 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?

Marlowe Fire & Security, headquartered in Manchester, tops this list with the largest team on record.

Which city has the most fire alarm installation companies?

London leads with 99 headquartered companies, followed by Manchester (22) and Glasgow (18).

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 3,345 verified decision-maker contacts tracked across these 1,161 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 20, 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.