Company lists · Data refreshed September 2026

Top 25 Preventive electrical maintenance based in the United Kingdom

Name: Preventive electrical maintenance 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 1,644 companies tracked

RevenueBase identified 1,644 preventive electrical maintenance headquartered in the United Kingdom as of September 2026 and tracks 8,499 professional contacts across them, including 1,979 with verified work emails. London is the largest hub.

This list covers preventive electrical maintenance 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

1,644Companies

8,499Contacts tracked

1,979Verified emails

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The 25 largest preventive electrical maintenance based in the United Kingdom

Ranked by team size

Top 25 of 1,644 preventive electrical maintenance 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 preventive electrical maintenance: 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	Quartzelec Limited	Partial evidence	Rugby, United KingdomHQ checked Sep 20, 2026	501-1,000	412 contacts →
	Partial evidence “Quartzelec is a leading independent electrical engineering group delivering solutions and services in both UK and global markets.” Source: RevenueBase Database · checked Sep 20, 2026
2	Guardian Electrical Compliance LTD	Partial evidence	Sheffield, United KingdomHQ checked Sep 20, 2026	51-200	137 contacts →
	Partial evidence “Founded in 2010, Guardian Electrical Compliance Ltd have become the market leaders in terms of Duty Holder guidance, technical & legislative support, site delivery and after sales…” Source: RevenueBase Database · checked Sep 20, 2026
3	AKD	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 20, 2026	51-200	79 contacts →
	Indirect evidence “AKD’s clients get quick results, normally leading to reduced costs and gaining an improved service.” Source: RevenueBase Database · checked Sep 20, 2026
4	Fletcher Moorland	Partial evidence	Stoke On Trent, United KingdomHQ checked Sep 20, 2026	51-200	75 contacts →
	Partial evidence “Fletcher Moorland Ltd, are the experts in repairing, replacing, or upgrading Electric Motors, Pumps, Air Handling Units, Inverter Drives, Servo Motors, HMIs, PCBs, PSUs and more.” Source: RevenueBase Database · checked Sep 20, 2026
5	MKE Engineering Group	Partial evidence	Sittingbourne, United KingdomHQ checked Sep 20, 2026	51-200	63 contacts →
	Partial evidence “MKE Engineering (Mid Kent Electrical) is the largest independent engineering service provider of its kind in the South East, operating from 3 different sites covering Kent…” Source: RevenueBase Database · checked Sep 20, 2026
6	Premier Electrics	Partial evidence	Magherafelt, United KingdomHQ checked Sep 20, 2026	51-200	58 contacts →
	Partial evidence “Premier Electrics have been delivering exciting projects throughout Ireland, UK and Europe since 1993.” Source: RevenueBase Database · checked Sep 20, 2026
7	The Wiggett Group LTD	Partial evidence	Brentwood, United KingdomHQ checked Sep 20, 2026	201-500	51 contacts →
	Partial evidence “Wiggett Electrical has gone from strength to strength.” Source: RevenueBase Database · checked Sep 20, 2026
8	NES	Partial evidence	Inverness, United KingdomHQ checked Sep 20, 2026	11-50	51 contacts →
	Partial evidence “NES is an Industrial and Commercial Electrical Engineering and Contracting business, based in the North and North East of Scotland.” Source: RevenueBase Database · checked Sep 20, 2026
9	Edmund Services	Partial evidence	Upminster, United KingdomHQ checked Sep 20, 2026	51-200	47 contacts →
	Partial evidence “M&E Maintenance & Installation Service Provider” Source: RevenueBase Database · checked Sep 20, 2026
10	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
11	Electriql	Strong evidence	Thatcham, United KingdomHQ checked Sep 20, 2026	51-200	43 contacts →
	Strong evidence “ElectriQL leads the way in lighting maintenance, LED installation and electrical compliance testing.” Source: RevenueBase Database · checked Sep 20, 2026
12	Calbarrie Compliance Services LTD	Partial evidence	Cheltenham, United KingdomHQ checked Sep 20, 2026	51-200	42 contacts →
	Partial evidence “Calbarrie Compliance Services Ltd (Calbarrie) is the UK’s market leader in electrical compliance services and has been trading within the Health & Safety and Compliance sectors…” Source: RevenueBase Database · checked Sep 20, 2026
13	Norwood Electrical UK LTD	Partial evidence	Lockington, United KingdomHQ checked Sep 20, 2026	51-200	40 contacts →
	Partial evidence “Norwood Electrical (UK) Ltd offer a full range of electrical services and specialises in electrical compliance.” Source: RevenueBase Database · checked Sep 20, 2026
14	F.E.S. EX Limited	Indirect evidence	Grimsby, United KingdomHQ checked Sep 20, 2026	51-200	39 contacts →
	Indirect evidence “Established over 20 years ago by our Chairman, F.E.S.(EX) is a leading provider of a range of E, I&M services for all industries across both hazardous and non- hazardous…” Source: RevenueBase Database · checked Sep 20, 2026
15	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
16	Jlec Electrical LTD	Partial evidence	Bradford, United KingdomHQ checked Sep 20, 2026	11-50	38 contacts →
	Partial evidence “JLEC Electrical is committed to providing premium quality along with competitive service to all customers new and old.” Source: RevenueBase Database · checked Sep 20, 2026
17	Intersafe Limited	Partial evidence	Southampton, United KingdomHQ checked Sep 20, 2026	11-50	36 contacts →
	Partial evidence “COMPANY OVERVIEW Based near Southampton, Intersafe are compliance specialists providing a range of electrical testing services for large, commercial sites.” Source: RevenueBase Database · checked Sep 20, 2026
18	Sa3 Power	Partial evidence	Cookstown, United KingdomHQ checked Sep 20, 2026	51-200	35 contacts →
	Partial evidence “SA3 Power are a Specialized Electrical Installer that provides electrical services for the Data Centers Industry across Europe.” Source: RevenueBase Database · checked Sep 20, 2026
19	Group Management Electrical Surveys Limited	Partial evidence	Halifax, United KingdomHQ checked Sep 20, 2026	11-50	32 contacts →
	Partial evidence “For the last 25 years, Group Management Electrical Surveys have been providing Electrical Inspection, Test and Documentation services to many of the UK's leading companies.” Source: RevenueBase Database · checked Sep 20, 2026
20	Project Solver LTD	Partial evidence	Dunmow, United KingdomHQ checked Sep 20, 2026	11-50	31 contacts →
	Partial evidence “We are a leading provider of electrical compliance and support services in the built environment.” Source: RevenueBase Database · checked Sep 20, 2026
21	Ashby Electrical Limited	Strong evidence	Pelsall, United KingdomHQ checked Sep 20, 2026	11-50	30 contacts →
	Strong evidence “Ashby Electrical provide a complete range of electrical design, installation, testing, inspection and maintenance services nationwide.” Source: RevenueBase Database · checked Sep 20, 2026
22	HCM Electrical LTD	Partial evidence	England, United KingdomHQ checked Sep 20, 2026	51-200	29 contacts →
	Partial evidence “HCM Electrical Ltd is a trusted provider of high-quality electrical services, delivering excellence to clients across various industries.” Source: RevenueBase Database · checked Sep 20, 2026
23	AC Group	Indirect evidence	Stockport, United KingdomHQ checked Sep 20, 2026	11-50	28 contacts →
	Indirect evidence “AC Group Ltd is located in Dukinfield, close to Cheshire.” Source: RevenueBase Database · checked Sep 20, 2026
24	Wren Environmental LTD	Strong evidence	Leatherhead, United KingdomHQ checked Sep 20, 2026	51-200	28 contacts →
	Strong evidence “Wren Environmental Ltd specialise in the Planned Preventative Maintenance and Installation Services within the Mechanical and Electrical industries.” Source: RevenueBase Database · checked Sep 20, 2026
25	LM Services NI LTD	Partial evidence	Belfast, United KingdomHQ checked Sep 20, 2026	51-200	27 contacts →
	Partial evidence “LM Services (NI) Ltd formerly known as LM Electric is an electrical and mechanical engineering company dedicated to developing solutions through the application of innovative…” 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: preventive electrical maintenance. 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 preventive electrical maintenance.
Partial evidence: Its own public description names part of preventive electrical maintenance, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name preventive electrical maintenance. 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 1,644 preventive electrical maintenance based in the United Kingdom

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Preventive electrical maintenance based in the United Kingdom at a glance

As of Sep 20, 2026

23.3%Verified-email coverage

5.2Average contacts per company

1-10Median size (employees)

5.7%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

1,086

11-50

451

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 1,644 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 preventive electrical maintenance, 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 “preventive electrical maintenance”. 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 preventive electrical maintenance), 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 preventive electrical maintenance, 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, 1,979 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.

Preventive electrical maintenance by metro

Preventive electrical maintenance in London94

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 preventive electrical maintenance, 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 preventive electrical maintenance are there based in the United Kingdom?

RevenueBase identified 1,644 preventive electrical maintenance 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?

Quartzelec Limited, headquartered in Rugby, tops this list with the largest team on record.

Which city has the most preventive electrical maintenance?

London leads with 94 headquartered companies, followed by Manchester (24) and Bristol (19).

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 1,979 verified decision-maker contacts tracked across these 1,644 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.