Company lists · Data refreshed September 2026

Top 25 Electrical system testing companies based in the United Kingdom

RevenueBase identified 1,280 company matches for electrical system testing companies associated with the United Kingdom as of September 2026 and tracks 5,844 professional contacts across them, including 1,438 with verified work emails. London is the largest hub.

This list covers company matches for electrical system testing 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
1,280Companies
5,844Contacts tracked
1,438Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest electrical system testing companies based in the United Kingdom

Ranked by team size
Top 25 of 1,280 company matches for electrical system testing 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 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
2Exact 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
3Exact 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
4Exact 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
5Exact 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
6Exact 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
7Exact 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
8Exact matchBlandford Forum, United KingdomHQ recorded Sep 19, 202651-20052 contacts →

Exact match

“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 &…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact 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
10Exact 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
11Exact 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
12Exact 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
13Exact 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
14Exact 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
15Exact matchGrimsby, United KingdomHQ recorded Sep 19, 202651-20039 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchStock, United KingdomHQ recorded Sep 19, 202611-5038 contacts →

Exact match

“Tired of poor service?”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchSouthampton, United KingdomHQ recorded Sep 19, 202611-5036 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 · Sep 19, 2026 · View company records in RevenueBase
18Exact matchCookstown, United KingdomHQ recorded Sep 19, 202651-20035 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 · Sep 19, 2026 · View company records in RevenueBase
19Exact matchSwanley, United KingdomHQ recorded Sep 19, 202651-20032 contacts →

Exact match

“We offer a wide range of services to building owners, occupiers, social landlords and property managers with a focus on building safety and compliance, to help our clients reduce…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchHalifax, United KingdomHQ recorded Sep 19, 202611-5032 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 · Sep 19, 2026 · View company records in RevenueBase
21Exact matchWatford, United KingdomHQ recorded Sep 19, 202611-5032 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 · Sep 19, 2026 · View company records in RevenueBase
22Exact matchDunmow, United KingdomHQ recorded Sep 19, 202611-5031 contacts →

Exact match

“We are a leading provider of electrical compliance and support services in the built environment.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchPelsall, United KingdomHQ recorded Sep 19, 202611-5030 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 · Sep 19, 2026 · View company records in RevenueBase
24Exact matchIpswich, United KingdomHQ recorded Sep 19, 202611-5026 contacts →

Exact match

“Firstfield Electrical Ltd are specialists in large-scale industrial and commercial electrical installations, control systems, inspections and domestic works.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchLurgan, United KingdomHQ recorded Sep 19, 202651-20026 contacts →

Exact match

“Welcome to Little Electrical, your comprehensive partner for electrical contracting and engineering solutions.”

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

Showing 25 of 1,280 electrical system testing companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,438 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Electrical system testing companies based in the United Kingdom at a glance

As of Sep 19, 2026
24.6%Verified-email coverage
4.6Average contacts per company
1-10Median size (employees)
5.9%Largest-city concentration · London
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
873
11-50
312
51-200
42
201-500
2
501-1,000
2
1,001-5,000
2
10001+
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 1,280 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 system testing 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 1,438 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 system testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,280 company matches for electrical system testing 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?

Guardian Electrical Compliance LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most electrical system testing companies?

London leads with 76 company records, followed by Manchester (20) and Leeds (12).

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 1,438 professional contacts with verified work emails tracked across these 1,280 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 1,280 electrical system testing companies based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

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.