Company lists · Data refreshed September 2026

Top 25 Electrical testing laboratories based in the United Kingdom

Name: Electrical testing laboratories 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 569 companies tracked

RevenueBase identified 569 electrical testing laboratories headquartered in the United Kingdom as of September 2026 and tracks 32,765 professional contacts across them, including 11,713 with verified work emails. London is the largest hub.

This list covers electrical testing laboratories 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

569Companies

32,765Contacts tracked

11,713Verified emails

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The 25 largest electrical testing laboratories based in the United Kingdom

Ranked by team size

Top 25 of 569 electrical testing laboratories 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 laboratories: 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	Intertek	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	23,155 contacts →
	Indirect evidence “Intertek is a leading Total Quality Assurance provider to industries worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
2	Element Materials Technology	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	4,200 contacts →
	Partial evidence “The Element Materials Technology Group is one of the world’s leading global providers of testing, inspection, and certification services for a diverse range of products…” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	British Engineering Services Group	Partial evidence	Warrington, United KingdomHQ checked Sep 19, 2026	1,001-5,000	776 contacts →
	Partial evidence “Testing, inspection, certification and compliance is our core business so that’s what gets 100% of our focus.” Source: RevenueBase Database · checked Sep 19, 2026
5	Warringtonfire	Partial evidence	Warrington, United KingdomHQ checked Sep 19, 2026	201-500	177 contacts →
	Partial evidence “Warringtonfire is proud to be part of Element Materials Technology, the leader in Testing, Inspection, Certification and Calibration services.” Source: RevenueBase Database · checked Sep 19, 2026
6	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
7	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
8	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
9	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
10	BM Trada Certification	Partial evidence	Hughenden, United KingdomHQ checked Sep 19, 2026	501-1,000	62 contacts →
	Partial evidence “BM TRADA is proud to be part of Element, the market leader in Testing, Inspection, and Certification services.” Source: RevenueBase Database · checked Sep 19, 2026
11	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
12	Eurofins E&e UK	Strong evidence	York, United KingdomHQ checked Sep 19, 2026	51-200	53 contacts →
	Strong evidence “Eurofins E&E UK provides a comprehensive range of testing, certification and compliance services for designers and manufacturers of electronic and electrical products.” Source: RevenueBase Database · checked Sep 19, 2026
13	Amfax LTD	Indirect evidence	Blandford Forum, United KingdomHQ checked Sep 19, 2026	51-200	52 contacts →
	Indirect evidence “Amfax is a world class test system solutions provider, delivering high quality, high performance and cost effective automated test equipment to the aerospace, defence, rail &…” Source: RevenueBase Database · checked Sep 19, 2026
14	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
15	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
16	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
17	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
18	Effectech	Partial evidence	Uttoxeter, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Partial evidence “EffecTech is a global leading provider of accredited calibration and testing services to the oil, gas and power industries.” Source: RevenueBase Database · checked Sep 19, 2026
19	Intersafe Limited	Strong evidence	Southampton, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Strong 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 19, 2026
20	Eurofins E&e CML LTD	Indirect evidence	Ellesmere Port, United KingdomHQ checked Sep 19, 2026	11-50	34 contacts →
	Indirect evidence “Eurofins E&E CML Limited (CML) is registered as a UK Approved Body (No 2503) and, through the Dutch Government, CML B.V.” Source: RevenueBase Database · checked Sep 19, 2026
21	Kiwa Product Compliance	Partial evidence	Aylesbury, United KingdomHQ checked Sep 19, 2026	51-200	33 contacts →
	Partial evidence “Founded in 2004, and specialising in Global Market Access of wireless communication, ITE & electrical products for domestic & commercial use.” Source: RevenueBase Database · checked Sep 19, 2026
22	Aardvarc Electrical Engineers LTD	Indirect evidence	Hebburn, United KingdomHQ checked Sep 19, 2026	51-200	33 contacts →
	Indirect evidence “High Voltage Specialists” Source: RevenueBase Database · checked Sep 19, 2026
23	Group Management Electrical Surveys Limited	Partial evidence	Halifax, United KingdomHQ checked Sep 19, 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 19, 2026
24	Martindale Electric Co. LTD	Strong evidence	Watford, United KingdomHQ checked Sep 19, 2026	11-50	32 contacts →
	Strong evidence “With over 95 years of experience, Martindale Electric is one of the most trusted brands in electrical safety testing.” Source: RevenueBase Database · checked Sep 19, 2026
25	Ashby Electrical Limited	Strong evidence	Pelsall, United KingdomHQ checked Sep 19, 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 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 laboratories. 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 laboratories.
Partial evidence: Its own public description names part of electrical testing laboratories, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical testing laboratories. 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 569 electrical testing laboratories based in the United Kingdom

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Electrical testing laboratories based in the United Kingdom at a glance

As of Sep 19, 2026

35.7%Verified-email coverage

57.6Average contacts per company

1-10Median size (employees)

7.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

372

11-50

133

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 569 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 laboratories, 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 laboratories”. 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 laboratories), 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 laboratories, 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, 11,713 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 laboratories by metro

Electrical testing laboratories in London43

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 laboratories, 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 laboratories are there based in the United Kingdom?

RevenueBase identified 569 electrical testing laboratories 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?

Intertek, headquartered in London, tops this list with the largest team on record.

Which city has the most electrical testing laboratories?

London leads with 43 headquartered companies, followed by Manchester (14) and Sheffield (7).

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 11,713 verified decision-maker contacts tracked across these 569 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.