Company lists · Data refreshed September 2026

Top 25 Electrical testing and inspection companies based in the United Kingdom

Name: Electrical testing and inspection 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 19, 2026 2,995 companies tracked

RevenueBase identified 2,995 electrical testing and inspection companies headquartered in the United Kingdom as of September 2026 and tracks 13,045 professional contacts across them, including 3,545 with verified work emails. London is the largest hub.

This list covers electrical testing and inspection 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 19, 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 19, 2026 86% judged on-target in blind review

2,995Companies

13,045Contacts tracked

3,545Verified emails

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The 25 largest electrical testing and inspection companies based in the United Kingdom

Ranked by team size

Top 25 of 2,995 electrical testing and inspection companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electrical testing and inspection 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	Megger	Indirect evidence	Dover, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,113 contacts →
	Indirect evidence “Megger supports the people who keep essential services running.” Source: RevenueBase Database · checked Sep 19, 2026
2	JKM	Partial evidence	Bedlington, United KingdomHQ checked Sep 19, 2026	201-500	183 contacts →
	Partial evidence “JKM Electricals is a well-established company which has built up a first-class reputation, Through successfully delivering high-quality workmanship.” Source: RevenueBase Database · checked Sep 19, 2026
3	Guardian Electrical Compliance LTD	Partial evidence	Sheffield, United KingdomHQ checked Sep 19, 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 19, 2026
4	Niceic	Partial evidence	Dunstable, United KingdomHQ checked Sep 19, 2026	201-500	131 contacts →
	Partial evidence “NICEIC is the UK’s largest certification body for electrical businesses.” Source: RevenueBase Database · checked Sep 19, 2026
5	Allianz Engineering Inspection	Partial evidence	Guildford, United KingdomHQ checked Sep 19, 2026	501-1,000	116 contacts →
	Partial evidence “The leaders in engineering inspection services for the UK & Republic of Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
6	RGE Services	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	94 contacts →
	Partial evidence “We’ve been providing fire and electrical compliance services for over 30 years, supporting clients across London and the Southeast with our locally based engineers.” Source: RevenueBase Database · checked Sep 19, 2026
7	Sureserve Compliance Fire	Strong evidence	Horsham, United KingdomHQ checked Sep 19, 2026	501-1,000	94 contacts →
	Strong evidence “With over 35 Years expertise, Sureserve Compliance Fire is an Industry leading business excelling in delivering Fire and Electrical compliance and testing services to housing…” Source: RevenueBase Database · checked Sep 19, 2026
8	Seaward	Strong evidence	Peterlee, United KingdomHQ checked Sep 19, 2026	51-200	83 contacts →
	Strong evidence “With over 75 years’ experience at the cutting edge of electrical safety testing, our expertise and innovations have produced a number of world firsts.” Source: RevenueBase Database · checked Sep 19, 2026
9	Mcintyre Compliance Services	Partial evidence	Peterborough, United KingdomHQ checked Sep 19, 2026	201-500	79 contacts →
	Partial evidence “McIntyre Compliance Services is a NICEIC, SSAIB, BAFE, BMTRADA approved contractor, carrying out all aspects of electrical works, fire, security and passive fire compliance works…” Source: RevenueBase Database · checked Sep 19, 2026
10	AKD	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 19, 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 19, 2026
11	Allsaved LTD	Indirect evidence	Pulborough, United KingdomHQ checked Sep 19, 2026	51-200	59 contacts →
	Indirect evidence “Welcome to Allsaved.” Source: RevenueBase Database · checked Sep 19, 2026
12	Basec Group Limited Basec	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 19, 2026	51-200	55 contacts →
	Partial evidence “BASEC Group Limited, a part of Kiwa, is a global leader in product testing and certification services for power, energy, data/signal cables and ancillary products, in addition to…” Source: RevenueBase Database · checked Sep 19, 2026
13	Lantei	Strong evidence	Preston, United KingdomHQ checked Sep 19, 2026	51-200	53 contacts →
	Strong evidence “We are the first choice trusted partner, supporting businesses in meeting their regulatory electrical testing requirements.” Source: RevenueBase Database · checked Sep 19, 2026
14	The Wiggett Group LTD	Partial evidence	Brentwood, United KingdomHQ checked Sep 19, 2026	201-500	51 contacts →
	Partial evidence “Wiggett Electrical has gone from strength to strength.” Source: RevenueBase Database · checked Sep 19, 2026
15	Monitra	Strong evidence	Manchester, United KingdomHQ checked Sep 19, 2026	51-200	51 contacts →
	Strong evidence “Monitra (formerly HVPD) are experts in the field of Partial Discharge (PD) testing and monitoring of Medium Voltage and High Voltage electrical equipment, which can be performed…” Source: RevenueBase Database · checked Sep 19, 2026
16	NES	Partial evidence	Inverness, United KingdomHQ checked Sep 19, 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 19, 2026
17	NDT Group	Partial evidence	Deeside, United KingdomHQ checked Sep 19, 2026	11-50	48 contacts →
	Partial evidence “We protect people, assets and the environment in high-risk industries through precise, responsive and reporting-led inspection services that give our clients total confidence in…” Source: RevenueBase Database · checked Sep 19, 2026
18	GCS Compliance	Indirect evidence	Rochester, United KingdomHQ checked Sep 19, 2026	11-50	47 contacts →
	Indirect evidence “GCS Compliance Ltd are a specialist independent auditing company providing quality safety, expert technical, compliance management consultancy services and professional training…” Source: RevenueBase Database · checked Sep 19, 2026
19	Pass LTD	Indirect evidence	Stockton-on-tees, United KingdomHQ checked Sep 19, 2026	51-200	47 contacts →
	Indirect evidence “PASS Limited offers a comprehensive solution for customers including test equipment, training and calibration.” Source: RevenueBase Database · checked Sep 19, 2026
20	Fixatex LTD	Partial evidence	Hertford, United KingdomHQ checked Sep 19, 2026	51-200	46 contacts →
	Partial evidence “Electrical & Fire Protection Services, Domestic & Commercial.” Source: RevenueBase Database · checked Sep 19, 2026
21	Electriql	Strong evidence	Thatcham, United KingdomHQ checked Sep 19, 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 19, 2026
22	Gas-Elec Group	Indirect evidence	Bury St. Edmunds, United KingdomHQ checked Sep 19, 2026	51-200	43 contacts →
	Indirect evidence “The company specialises in being able to provide a bespoke service to the homeowners, landlords, managing agents and the commercial sectors.” Source: RevenueBase Database · checked Sep 19, 2026
23	Calbarrie Compliance Services LTD	Partial evidence	Cheltenham, United KingdomHQ checked Sep 19, 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 19, 2026
24	Cenelec Standards Inspections LTD	Strong evidence	Cramlington, United KingdomHQ checked Sep 19, 2026	51-200	42 contacts →
	Strong evidence “Cenelec Standards Inspections specialise in Electrical, Instrument and Mechanical Hazardous Area Inspection and Maintenance for clients in need of support to comply with the…” Source: RevenueBase Database · checked Sep 19, 2026
25	Norwood Electrical UK LTD	Partial evidence	Lockington, United KingdomHQ checked Sep 19, 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 19, 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: electrical testing and inspection 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 electrical testing and inspection companies.
Partial evidence: Its own public description names part of electrical testing and inspection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical testing and inspection 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 2,995 electrical testing and inspection companies based in the United Kingdom

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Electrical testing and inspection companies based in the United Kingdom at a glance

As of Sep 19, 2026

27.2%Verified-email coverage

4.4Average contacts per company

1-10Median size (employees)

6.4%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

2,088

11-50

716

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 2,995 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 electrical testing and inspection 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 “electrical testing and inspection 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 electrical testing and inspection 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 electrical testing and inspection 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, 3,545 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 19, 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.

Electrical testing and inspection companies by metro

Electrical testing and inspection companies in London192
Electrical testing and inspection companies in Manchester41
Electrical testing and inspection companies in Bristol30
Electrical testing and inspection companies in Sheffield30
Electrical testing and inspection companies in Leicester29
Electrical testing and inspection companies in Nottingham26
Electrical testing and inspection companies in Southampton25

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 electrical testing and inspection 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 electrical testing and inspection companies are there based in the United Kingdom?

RevenueBase identified 2,995 electrical testing and inspection 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?

Megger, headquartered in Dover, tops this list with the largest team on record.

Which city has the most electrical testing and inspection companies?

London leads with 192 headquartered companies, followed by Manchester (41) and Bristol (30).

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 3,545 verified decision-maker contacts tracked across these 2,995 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 19, 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.