Company lists · Data refreshed November 2026

Top 17 Test leads suppliers based in the United Kingdom

RevenueBase identified 46 company matches for test leads suppliers associated with the United Kingdom as of November 2026 and tracks 1,611 professional contacts across them, including 978 with verified work emails. Harrow is the largest hub.

This list covers company matches for test leads suppliers 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 2, 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 2, 2026 How this list was built
46Companies
1,611Contacts tracked
978Verified emails
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The 17 largest test leads suppliers based in the United Kingdom

Ranked by team size
Top 17 of 46 company matches for test leads suppliers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 2, 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 Nov 2, 20261,001-5,0001,163 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
2Exact matchPeterlee, United KingdomHQ recorded Nov 2, 202651-20081 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 · Nov 2, 2026 · View company records in RevenueBase
3Exact matchHarrow, United KingdomHQ recorded Nov 2, 2026201-50057 contacts →

Exact match

“We are the experts in test and measurement access and acquisition.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
4Exact matchStockton-on-tees, United KingdomHQ recorded Nov 2, 202651-20053 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
5Exact matchWatford, United KingdomHQ recorded Nov 2, 202611-5035 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 2, 2026 · View company records in RevenueBase
6Exact matchMaidstone, United KingdomHQ recorded Nov 2, 202651-20028 contacts →

Exact match

“Offering a comprehensive solution to meet the demands of Test & Measurement professionals both nationally and internationally, including Test Equipment Sales, Calibration…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
7Exact matchFarnborough, United KingdomHQ recorded Nov 2, 202611-5022 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
8Exact matchWatford, United KingdomHQ recorded Nov 2, 202611-5016 contacts →

Exact match

“Tel:+44 (0)1923 442244 Email: sales@instrotech.com Instrotech is a specialist distributor of electrical and environmental test equipment representing all of the major brands.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
9Exact matchKettering, United KingdomHQ recorded Nov 2, 202611-5016 contacts →

Exact match

“Technical distributor of electronic and electrical test and measurement equipment and electrical, temperature and pressure calibration systems.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
10Exact matchSkelmersdale, United KingdomHQ recorded Nov 2, 202611-5014 contacts →

Exact match

“Founded in January 2008, located in Skelmersdale (Lancashire) in North West England.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
11Exact matchLetchworth Garden City, United KingdomHQ recorded Nov 2, 202651-20011 contacts →

Exact match

“The Peak Group is a proven provider of automated test and measurement solutions supporting every stage of the assembly process from component testing to highly complex functional…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
12Exact matchHarrow, United KingdomHQ recorded Nov 2, 2026201-50011 contacts →

Exact match

“Welcome to Microlease, experts in Test and Measurement equipment and the leading source for equipment supply and management.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
13Exact matchMaidstone, United KingdomHQ recorded Nov 2, 202611-505 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
14Exact matchCroydon, United KingdomHQ recorded Nov 2, 20261-105 contacts →

Exact match

“The leading supplier of fault location and cable diagnostic test vans and systems in the UK.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
15Exact matchMoira, United KingdomHQ recorded Nov 2, 202611-504 contacts →

Exact match

“Founded in 1970, IMEX is now a long established and thriving business.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
16Exact matchEpsom, United KingdomHQ recorded Nov 2, 20261-104 contacts →

Exact match

“Metrel UK is a recognised supplier in the measurement and testing industry through the design and manufacture of advanced and innovative test and measurement solutions.”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase
17Exact matchHarrogate, United KingdomHQ recorded Nov 2, 20261-102 contacts →

Exact match

“Camax UK Ltd was formed in 1983 to distribute test and measurement instruments and now also represents the major suppliers and manufacturers of electricity meters and current…”

Recorded in the RevenueBase company graph · Nov 2, 2026 · View company records in RevenueBase

Showing 17 of 46 test leads suppliers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 978 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Test leads suppliers based in the United Kingdom at a glance

As of Nov 2, 2026
60.7%Verified-email coverage
35.0Average contacts per company
11-50Median size (employees)
6.5%Largest-city concentration · Harrow
Nov 2, 2026Page data refreshed

Companies by employee count

1-10
21
11-50
14
51-200
6
201-500
2
501-1,000
2
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 46 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 “test leads suppliers” 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 978 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 2, 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 “test leads suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many test leads suppliers are there based in the United Kingdom?

RevenueBase identified 46 company matches for test leads suppliers 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?

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

Which city has the most test leads suppliers?

Harrow leads with 3 company records, followed by Watford (3) and Hamilton (2).

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 978 professional contacts with verified work emails tracked across these 46 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 2, 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.