Company lists · Data refreshed November 2026

Top 25 Grounding system testing companies based in the United Kingdom

RevenueBase identified 118 company matches for grounding system testing companies associated with the United Kingdom as of November 2026 and tracks 707 professional contacts across them, including 265 with verified work emails. London is the largest hub.

This list covers company matches for grounding 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 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
118Companies
707Contacts tracked
265Verified emails
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The 25 largest grounding system testing companies based in the United Kingdom

Ranked by team size
Top 25 of 118 company matches for grounding system testing companies 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 matchNottingham, United KingdomHQ recorded Nov 6, 2026201-500173 contacts →

Exact match

“Our customers made us the UK market leader in electrical earthing systems and lightning protection systems.”

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 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
4Exact 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
5Exact 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
6Exact 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
7Exact 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
8Exact matchMacclesfield, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“Bailey International is a major specialist contracting company in the industrial chimney and tall structures sector.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchBexhill On-sea, United KingdomHQ recorded Nov 6, 202611-5010 contacts →

Exact match

“Bexhill Electrical Ltd is a fully approved electrical contractor providing a range of electrical design, installation and testing services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchCannock, United KingdomHQ recorded Nov 6, 202651-20010 contacts →

Exact match

“Electrical testing, installations, repairs & remedial works.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchSwindon, United KingdomHQ recorded Nov 6, 202611-509 contacts →

Exact match

“The Electrical Compliance Collective Ltd (TECC Ltd) is an award-winning electrical contractor based in Swindon, Wiltshire, supporting domestic, commercial and industrial customers…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchMotherwell, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Technical Earthing Services Ltd are a team of professional electrical engineers who provide consultancy and contracting services within the following specialist electrical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchCaerphilly, United KingdomHQ recorded Nov 6, 202611-508 contacts →

Exact match

“Earthing Risk Management Ltd (ERM) provides HV Earthing and Lightning Protection consultancy services to the Electricity Industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchMaidstone, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Aylesford Electrical is a specialist testing, maintenance and installation provider based in Kent.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchBristol, United KingdomHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Are you in the data centre, utility, rail, energy, or nuclear sectors and need reliable technical solutions for HV Earthing or Lightning Design?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBuckingham Industrial Estate, United KingdomHQ recorded Nov 6, 202611-505 contacts →

Exact match

“Our team of qualified electricians provide the full range of electrical services to domestic, commercial and industrial sectors across Buckinghamshire and beyond.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchDriffield, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Welcome to Power Sonic Ltd If you require help and assistance with your electrical safety then you have come to the right place!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBishops Stortford, United KingdomHQ recorded Nov 6, 202611-505 contacts →

Exact match

“Electrical Contractors- Installation, Maintenance & Testing.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchGreenford, United KingdomHQ recorded Nov 6, 20261-105 contacts →

Exact match

“Set up in 2012, we have carried out many installations, mostly commercial & industrial, for a number of high profile clients such as Marks & Spencers, Wembley National Stadium and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchWakefield, United KingdomHQ recorded Nov 6, 202611-504 contacts →

Exact match

“At GRW we inspect and test electrical installations in commercial, industrial, public and residential rental premises, ensuring their compliance with BS 7671, and with statutory…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchBournemouth, United KingdomHQ recorded Nov 6, 202611-504 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBradford, United KingdomHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Since 1998 Inspexx Ltd has been a trusted partner in electrical inspections.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchWeymouth, United KingdomHQ recorded Nov 6, 202611-504 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchNewcastle, United KingdomHQ recorded Nov 6, 202611-503 contacts →

Exact match

“The company has a proud heritage of traditional skills and values fused with professional management.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchManchester, United KingdomHQ recorded Nov 6, 202611-503 contacts →

Exact match

“We are electrical contractors offering expert solutions in all aspects of electrical works.”

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

Showing 25 of 118 grounding system testing companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 265 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Nov 6, 2026
37.5%Verified-email coverage
6.0Average contacts per company
1-10Median size (employees)
8.5%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
63
11-50
41
51-200
7
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 118 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 “grounding 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 265 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 “grounding system testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 118 company matches for grounding system testing companies 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?

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

Which city has the most grounding system testing companies?

London leads with 10 company records, followed by Bristol (3) and Maidstone (3).

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 265 professional contacts with verified work emails tracked across these 118 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.

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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.