Company lists · Data refreshed September 2026

Top 25 Iso audit consulting firms based in the United Kingdom

RevenueBase identified 1,121 company matches for iso audit consulting firms associated with the United Kingdom as of September 2026 and tracks 38,994 professional contacts across them, including 12,961 with verified work emails. London is the largest hub.

This list covers company matches for iso audit consulting 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 September 28, 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 28, 2026 How this list was built
1,121Companies
38,994Contacts tracked
12,961Verified emails
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The 25 largest iso audit consulting firms based in the United Kingdom

Ranked by team size
Top 25 of 1,121 company matches for iso audit consulting firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 matchLondon, United KingdomHQ recorded Sep 28, 202610001+23,155 contacts →

Exact match

“Intertek is a leading Total Quality Assurance provider to industries worldwide.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 28, 20265,001-10,0004,200 contacts →

Exact match

“The Element Materials Technology Group is one of the world’s leading global providers of testing, inspection, and certification services for a diverse range of products…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchBurton Upon Trent, United KingdomHQ recorded Sep 28, 20261,001-5,000844 contacts →

Exact match

“SOCOTEC UK is a network of industry-leading experts we empower ambitious businesses at every stage of the asset lifecycle.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchWarrington, United KingdomHQ recorded Sep 28, 20261,001-5,000776 contacts →

Exact match

“Testing, inspection, certification and compliance is our core business so that’s what gets 100% of our focus.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchWilmslow, United KingdomHQ recorded Sep 28, 20261,001-5,000291 contacts →

Exact match

“The Citation Group offer unrivalled compliance and quality services to over businesses across the UK, Australia, New Zealand, and Canada.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchDunstable, United KingdomHQ recorded Sep 28, 2026501-1,000267 contacts →

Exact match

“NQA is a leading global certification body, respected for providing flexible and supportive certification and training services that are technically advanced and meet the needs of…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 28, 20261,001-5,000250 contacts →

Exact match

“Since 1987 HQTS has delivered product inspections, factory audits, testing and quality consulting throughout Asia.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchAylesbury, United KingdomHQ recorded Sep 28, 202651-200185 contacts →

Exact match

“Shirley Parsons is a global professional services firm with expertise in Health & Safety, Quality, Sustainability and Business Improvement.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchWarrington, United KingdomHQ recorded Sep 28, 2026201-500177 contacts →

Exact match

“Warringtonfire is proud to be part of Element Materials Technology, the leader in Testing, Inspection, Certification and Calibration services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchWest Malling, United KingdomHQ recorded Sep 28, 2026201-500138 contacts →

Exact match

“Amtivo Group provides expert certification services for ISO standards, as well as training and related services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-200124 contacts →

Exact match

“Established in 1963, McAdam initially focused on Civil Engineering Projects with Architecture added as a discipline in 1975.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchNorwich, United KingdomHQ recorded Sep 28, 202651-200115 contacts →

Exact match

“We believe in keeping ISO certification simple, so that's exactly what we do.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchChorley, United KingdomHQ recorded Sep 28, 202651-200109 contacts →

Exact match

“Roq is changing the way the world views Quality.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-200100 contacts →

Exact match

“ERM CVS provides science-based, independent assurance, verification certification and training services for the world’s leading organizations.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchManchester, United KingdomHQ recorded Sep 28, 202651-20099 contacts →

Exact match

“Our reputation for providing outstanding service explains why clients who joined us when we first opened our doors in 1993 are still with us today.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 28, 20265,001-10,00089 contacts →

Exact match

“Phenna Group is a global family of specialist businesses delivering Testing, Inspection, Certification and Compliance (TICC) services to customers worldwide.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5088 contacts →

Exact match

“Your partners in quality.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchBracknell, United KingdomHQ recorded Sep 28, 202651-20074 contacts →

Exact match

“Baines Simmons is a world-leading aviation safety consultancy, specialising in regulations, compliance, safety management, training, consulting and outsourcing.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchCamberley, United KingdomHQ recorded Sep 28, 202651-20068 contacts →

Exact match

“ADAMAS Consulting is a global specialist consultancy offering a full range of independent GCP, GVP, GLP, CSC and GMP Quality Assurance and Quality Management services on a global…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchCardiff, United KingdomHQ recorded Sep 28, 202651-20066 contacts →

Exact match

“The Minton Treharne & Davies Group provide scientific consultancy, surveying and testing services to a worldwide client base from our offices in the UK, USA and Asia.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchCardiff, United KingdomHQ recorded Sep 28, 202651-20064 contacts →

Exact match

“Ligtas: Safety Beyond Compliance At Ligtas, we help organisations take control of health, safety, and fire risk, simplifying compliance, protecting people, and creating a stronger…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchGlasgow, United KingdomHQ recorded Sep 28, 202611-5052 contacts →

Exact match

“FQM is a #QHSE (#Quality,#Health,#Safety,#Security and #Environmental compliance software, consultancy, coaching & training organisation, focused on delivering cost effective…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchGlasgow, United KingdomHQ recorded Sep 28, 202651-20050 contacts →

Exact match

“International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchAbingdon, United KingdomHQ recorded Sep 28, 202611-5047 contacts →

Exact match

“ZigZag QA is your trusted worldwide quality leader, offering true global reach and unrivaled expertise to reduce risk and efforts.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchRochester, United KingdomHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase

Showing 25 of 1,121 iso audit consulting firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 12,961 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Iso audit consulting firms based in the United Kingdom at a glance

As of Sep 28, 2026
33.2%Verified-email coverage
34.8Average contacts per company
1-10Median size (employees)
17.5%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
855
11-50
175
51-200
55
201-500
10
501-1,000
8
1,001-5,000
10
5,001-10,000
3
10001+
2

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 1,121 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 “iso audit consulting 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 12,961 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 28, 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 “iso audit consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many iso audit consulting firms are there based in the United Kingdom?

RevenueBase identified 1,121 company matches for iso audit consulting firms 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?

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

Which city has the most iso audit consulting firms?

London leads with 196 company records, followed by Manchester (28) and Aberdeen (16).

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 12,961 professional contacts with verified work emails tracked across these 1,121 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 28, 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.