Company lists · Data refreshed September 2026

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

RevenueBase identified 2,995 company matches for electrical testing and inspection companies associated with 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 company matches for electrical testing and inspection companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 19, 2026 How this list was built
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 company matches for electrical testing and inspection companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchDover, United KingdomHQ recorded Sep 19, 20261,001-5,0001,113 contacts →

Exact match

“Megger supports the people who keep essential services running.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchBedlington, United KingdomHQ recorded Sep 19, 2026201-500183 contacts →

Exact match

“JKM Electricals is a well-established company which has built up a first-class reputation, Through successfully delivering high-quality workmanship.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchSheffield, United KingdomHQ recorded Sep 19, 202651-200137 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchDunstable, United KingdomHQ recorded Sep 19, 2026201-500131 contacts →

Exact match

“NICEIC is the UK’s largest certification body for electrical businesses.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchGuildford, United KingdomHQ recorded Sep 19, 2026501-1,000116 contacts →

Exact match

“The leaders in engineering inspection services for the UK & Republic of Ireland.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 19, 2026201-50094 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchHorsham, United KingdomHQ recorded Sep 19, 2026501-1,00094 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchPeterlee, United KingdomHQ recorded Sep 19, 202651-20083 contacts →

Exact match

“With over 75 years’ experience at the cutting edge of electrical safety testing, our expertise and innovations have produced a number of world firsts.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchPeterborough, United KingdomHQ recorded Sep 19, 2026201-50079 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchEdinburgh, United KingdomHQ recorded Sep 19, 202651-20079 contacts →

Exact match

“AKD’s clients get quick results, normally leading to reduced costs and gaining an improved service.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchPulborough, United KingdomHQ recorded Sep 19, 202651-20059 contacts →

Exact match

“Welcome to Allsaved.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchMilton Keynes, United KingdomHQ recorded Sep 19, 202651-20055 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchPreston, United KingdomHQ recorded Sep 19, 202651-20053 contacts →

Exact match

“We are the first choice trusted partner, supporting businesses in meeting their regulatory electrical testing requirements.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchBrentwood, United KingdomHQ recorded Sep 19, 2026201-50051 contacts →

Exact match

“Wiggett Electrical has gone from strength to strength.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchManchester, United KingdomHQ recorded Sep 19, 202651-20051 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchInverness, United KingdomHQ recorded Sep 19, 202611-5051 contacts →

Exact match

“NES is an Industrial and Commercial Electrical Engineering and Contracting business, based in the North and North East of Scotland.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchDeeside, United KingdomHQ recorded Sep 19, 202611-5048 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchRochester, United KingdomHQ recorded Sep 19, 202611-5047 contacts →

Exact match

“GCS Compliance Ltd are a specialist independent auditing company providing quality safety, expert technical, compliance management consultancy services and professional training…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchStockton-on-tees, United KingdomHQ recorded Sep 19, 202651-20047 contacts →

Exact match

“PASS Limited offers a comprehensive solution for customers including test equipment, training and calibration.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchHertford, United KingdomHQ recorded Sep 19, 202651-20046 contacts →

Exact match

“Electrical & Fire Protection Services, Domestic & Commercial.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchThatcham, United KingdomHQ recorded Sep 19, 202651-20043 contacts →

Exact match

“ElectriQL leads the way in lighting maintenance, LED installation and electrical compliance testing.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchBury St. Edmunds, United KingdomHQ recorded Sep 19, 202651-20043 contacts →

Exact match

“The company specialises in being able to provide a bespoke service to the homeowners, landlords, managing agents and the commercial sectors.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchCheltenham, United KingdomHQ recorded Sep 19, 202651-20042 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchCramlington, United KingdomHQ recorded Sep 19, 202651-20042 contacts →

Exact match

“Cenelec Standards Inspections specialise in Electrical, Instrument and Mechanical Hazardous Area Inspection and Maintenance for clients in need of support to comply with the…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchLockington, United KingdomHQ recorded Sep 19, 202651-20040 contacts →

Exact match

“Norwood Electrical (UK) Ltd offer a full range of electrical services and specialises in electrical compliance.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 2,995 electrical testing and inspection companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 3,545 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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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
83
201-500
7
501-1,000
4
1,001-5,000
4

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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “electrical testing and inspection companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,545 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “electrical testing and inspection companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 2,995 company matches for electrical testing and inspection companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Megger tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most electrical testing and inspection companies?

London leads with 192 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 3,545 professional contacts with verified work emails tracked across these 2,995 companies; direct dials are available where recorded.

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.

Ready to reach these companies? Verified emails and direct dials for all 2,995 electrical testing and inspection companies based in the United Kingdom. Start with a free account, no credit card.

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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 SmartSearch, 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.