Company lists · Data refreshed November 2026

Top 25 Data center electrical testing firms based in the United Kingdom

RevenueBase identified 353 company matches for data center electrical testing firms associated with the United Kingdom as of November 2026 and tracks 1,554 professional contacts across them, including 441 with verified work emails. London is the largest hub.

This list covers company matches for data center electrical testing firms 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 November 6, 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 Nov 6, 2026 How this list was built
353Companies
1,554Contacts tracked
441Verified emails
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The 25 largest data center electrical testing firms based in the United Kingdom

Ranked by team size
Top 25 of 353 company matches for data center electrical testing firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchMilton Keynes, United KingdomHQ recorded Nov 6, 202651-20062 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchPreston, United KingdomHQ recorded Nov 6, 202651-20054 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact matchManchester, United KingdomHQ recorded Nov 6, 202651-20050 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchCheltenham, United KingdomHQ recorded Nov 6, 202651-20040 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 · Nov 6, 2026 · View company records in RevenueBase
5Exact matchSouthampton, United KingdomHQ recorded Nov 6, 202611-5038 contacts →

Exact match

“COMPANY OVERVIEW Based near Southampton, Intersafe are compliance specialists providing a range of electrical testing services for large, commercial sites.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchWatford, United KingdomHQ recorded Nov 6, 202611-5038 contacts →

Exact match

“With over 95 years of experience, Martindale Electric is one of the most trusted brands in electrical safety testing.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchCookstown, United KingdomHQ recorded Nov 6, 202651-20036 contacts →

Exact match

“SA3 Power are a Specialized Electrical Installer that provides electrical services for the Data Centers Industry across Europe.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchHalifax, United KingdomHQ recorded Nov 6, 202611-5035 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchPelsall, United KingdomHQ recorded Nov 6, 202611-5032 contacts →

Exact match

“Ashby Electrical provide a complete range of electrical design, installation, testing, inspection and maintenance services nationwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLeeds, United KingdomHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“Safety Inspections Group Ltd specialise in electrical safety for both residential and commercial premises, and was created by the founders of a multi-award winning electrical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBlisworth, United KingdomHQ recorded Nov 6, 202611-5020 contacts →

Exact match

“We are the UK’s leading provider of automated testing solutions for electronic and electrical products.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchBolton, United KingdomHQ recorded Nov 6, 202651-20018 contacts →

Exact match

“RNM ELECTRICAL LIMITED is a construction company based out of 10 THE HILLOCK THE HILLOCK, BOLTON, United Kingdom.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBishop Stortford, United KingdomHQ recorded Nov 6, 202651-20018 contacts →

Exact match

“At Novus Compliance Services Ltd we specialise in Electrical Testing and Inspection, Maintenance, Installation design, Energy Management and refurbishment for a wide range of…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMelksham, United KingdomHQ recorded Nov 6, 202611-5018 contacts →

Exact match

“HK Engineering Ltd is a leading engineering company specialising in electrical and gas testing and innovative solutions, with a solid commitment to excellence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchStowmarket, United KingdomHQ recorded Nov 6, 20261-1018 contacts →

Exact match

“HPES are a specialist technical electrical contractor, focussing on electrical installations, testing and compliance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchStaffordshire, United KingdomHQ recorded Nov 6, 202611-5015 contacts →

Exact match

“Specialising in recycling centres, distribution centres, manufacturing, and other industrial facilities.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchWarrington, United KingdomHQ recorded Nov 6, 20261-1015 contacts →

Exact match

“At Dal Electrical Services LTD we strive to create a culture that embraces collaboration, innovation and value for money.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBilton, United KingdomHQ recorded Nov 6, 20261-1015 contacts →

Exact match

“Choose MS Electrical Solutions LTD for all your electrical install needs and benefit from a dependable service, expert support and quality workmanship, with projects delivered on…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchManchester, United KingdomHQ recorded Nov 6, 202651-20013 contacts →

Exact match

“MET Group Technical provide a unique electrical energised inspection service to high & low voltage assets including your Power Distribution, Busbars, Submains & Fixed Wiring.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSileby, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Established in 2008, Raylec has a wealth of knowledge and experience in the electrical installations arena.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchGreat Shefford, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“Lewis Electrical has been established for over 10 years and can offer a wealth of experience in all aspects of the electrical contracting industry particularly the following…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchPaisley, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLarne, United KingdomHQ recorded Nov 6, 202611-5012 contacts →

Exact match

“Formed in 2012, Independent Company Safety Services (ICSS) Ltd specialise in Electrical Safety Compliance, and provides Portable Appliance Testing (PAT), Fixed Wire Testing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchWorksop, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchDinnington, United KingdomHQ recorded Nov 6, 20261-1011 contacts →

Exact match

“Electrical Engineers serving the industrial and commercial sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 353 data center electrical testing firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 441 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Data center electrical testing firms based in the United Kingdom at a glance

As of Nov 6, 2026
28.4%Verified-email coverage
4.4Average contacts per company
1-10Median size (employees)
8.2%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
226
11-50
93
51-200
12
201-500
1
1,001-5,000
1

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 353 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 “data center electrical testing firms” 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 441 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 November 6, 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 “data center electrical testing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many data center electrical testing firms are there based in the United Kingdom?

RevenueBase identified 353 company matches for data center electrical testing firms associated with the United Kingdom as of November 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?

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

Which city has the most data center electrical testing firms?

London leads with 29 company records, followed by Manchester (10) and Nottingham (6).

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 441 professional contacts with verified work emails tracked across these 353 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 November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 353 data center electrical testing firms 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.