Company lists · Data refreshed September 2026

Top 25 Accreditation bodies based in the United Kingdom

Name: Accreditation bodies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 195 companies tracked

RevenueBase identified 195 accreditation bodies headquartered in the United Kingdom as of September 2026 and tracks 3,153 professional contacts across them, including 980 with verified work emails. London is the largest hub.

This list covers accreditation bodies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

195Companies

3,153Contacts tracked

980Verified emails

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The 25 largest accreditation bodies based in the United Kingdom

Ranked by team size

Top 25 of 195 accreditation bodies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to accreditation bodies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	UKAS	Partial evidence	Staines-upon-thames, United KingdomHQ checked Sep 19, 2026	201-500	445 contacts →
	Partial evidence “UKAS is the world’s leading #accreditation body delivering confidence in products and services, and supporting global value chains.” Source: RevenueBase Database · checked Sep 19, 2026
2	NQA	Indirect evidence	Dunstable, United KingdomHQ checked Sep 19, 2026	501-1,000	267 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
3	British Board Of Agrément	Indirect evidence	Croxley Park, United KingdomHQ checked Sep 19, 2026	51-200	165 contacts →
	Indirect evidence “The British Board of Agrément (BBA) drives industry safety and quality by providing services that help clients through enabling innovation, identifying risk and demonstrating…” Source: RevenueBase Database · checked Sep 19, 2026
4	Amtivo Group	Indirect evidence	West Malling, United KingdomHQ checked Sep 19, 2026	201-500	138 contacts →
	Indirect evidence “Amtivo Group provides expert certification services for ISO standards, as well as training and related services.” Source: RevenueBase Database · checked Sep 19, 2026
5	Niceic	Indirect evidence	Dunstable, United KingdomHQ checked Sep 19, 2026	201-500	131 contacts →
	Indirect evidence “NICEIC is the UK’s largest certification body for electrical businesses.” Source: RevenueBase Database · checked Sep 19, 2026
6	CREST	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	118 contacts →
	Indirect evidence “CREST is an international not-for-profit, membership body representing the global cyber security industry.” Source: RevenueBase Database · checked Sep 19, 2026
7	BRCGS	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	105 contacts →
	Indirect evidence “BRCGS is a leading brand and consumer protection organisation, used by certificated suppliers over 130 countries, with certification issued through a global network of accredited…” Source: RevenueBase Database · checked Sep 19, 2026
8	APM Group	Indirect evidence	High Wycombe, United KingdomHQ checked Sep 19, 2026	51-200	94 contacts →
	Indirect evidence “We are a global leader for best practice solutions.” Source: RevenueBase Database · checked Sep 19, 2026
9	Irca International Register Of Certificated Auditors	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	88 contacts →
	Indirect evidence “Your partners in quality.” Source: RevenueBase Database · checked Sep 19, 2026
10	The CPD Certification Service	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	75 contacts →
	Indirect evidence “Continuing Professional Development (CPD) is the term used to describe the learning activities professionals engage in to develop and enhance their abilities.” Source: RevenueBase Database · checked Sep 19, 2026
11	NSI	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 19, 2026	51-200	72 contacts →
	Indirect evidence “NSI is the UK’s most recognised certification body for fire and security.” Source: RevenueBase Database · checked Sep 19, 2026
12	Association Of Mbas	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	54 contacts →
	Indirect evidence “The Association of MBAs, AMBA, is an international organisation recognised in the education sector as an impartial authority on MBA education.” Source: RevenueBase Database · checked Sep 19, 2026
13	The International Practitioners Of Holistic Medicine Iphm	Partial evidence	Littleborough, United KingdomHQ checked Sep 19, 2026	n/a	38 contacts →
	Partial evidence “The IPHM is an Accreditation Board for Therapists and Training Providers we offer International worldwide Accreditation for Therapists and Training Providers The International…” Source: RevenueBase Database · checked Sep 19, 2026
14	SSAIB	Indirect evidence	Whitley Bay, United KingdomHQ checked Sep 19, 2026	51-200	36 contacts →
	Indirect evidence “SSAIB (Security Systems and Alarms Inspection Board) is the leading certification body for organisations providing security systems and services, fire detection and alarm systems…” Source: RevenueBase Database · checked Sep 19, 2026
15	XDS Solutions	Indirect evidence	Witham, United KingdomHQ checked Sep 19, 2026	51-200	34 contacts →
	Indirect evidence “XDS Solutions is an ISO 17065 SASO-notified certification body, with a wide technical scope covering Europe, Middle East, Africa, and Asia.” Source: RevenueBase Database · checked Sep 19, 2026
16	NPORS	Strong evidence	Northwich, United KingdomHQ checked Sep 19, 2026	51-200	34 contacts →
	Strong evidence “One of the UK's leading Accreditation and Registration Bodies, working across various sectors, from Construction and Industrial to Agricultural and Marine.” Source: RevenueBase Database · checked Sep 19, 2026
17	Centre For Assessment LTD	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	11-50	34 contacts →
	Indirect evidence “Centre for Assessment Ltd is a leading certification body, delivering audits and assessments to thousands of clients both nationally and internationally.” Source: RevenueBase Database · checked Sep 19, 2026
18	British Accreditation Council	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	n/a	34 contacts →
	Indirect evidence “For over 30 years we have been responsible for setting standards within the independent further and higher education sector.” Source: RevenueBase Database · checked Sep 19, 2026
19	Ecmk LTD	Partial evidence	Solihull, United KingdomHQ checked Sep 19, 2026	11-50	32 contacts →
	Partial evidence “ecmk is a leading Government approved Accreditation provider for the Energy and Property Assessment Industry.” Source: RevenueBase Database · checked Sep 19, 2026
20	Clear Quality Limited	Indirect evidence	Rotherham, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “Clear Quality is a professional ISO Consultancy business and Prime Training provider based in South Yorkshire.” Source: RevenueBase Database · checked Sep 19, 2026
21	The CPD Group	Indirect evidence	Rothwell, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “Our Mission Our team are passionate and dedicated to making CPD easily benchmarked, accessible, transparent and consistent for all individuals and organisations enrolling on CPD…” Source: RevenueBase Database · checked Sep 19, 2026
22	Iaocr International Accrediting Organization For Clinical Research	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “IAOCR is the International Accrediting Organization for Clinical Research.” Source: RevenueBase Database · checked Sep 19, 2026
23	Simply Certification	Indirect evidence	Jarrow, United KingdomHQ checked Sep 19, 2026	1-10	21 contacts →
	Indirect evidence “The certification body of choice for the built environment.” Source: RevenueBase Database · checked Sep 19, 2026
24	ADISA	Indirect evidence	Harpenden, United KingdomHQ checked Sep 19, 2026	1-10	21 contacts →
	Indirect evidence “Launched in 2010, ADISA is a UKAS accredited certification body operating including certification to a Standard 8.0 which is a UK GDPR Certification Scheme formally recognised by…” Source: RevenueBase Database · checked Sep 19, 2026
25	Interface NRM	Indirect evidence	Priorslee, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “We are proudly the only employee-owned UKAS-accredited certification and verification body in the UK.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: accreditation bodies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names accreditation bodies.
Partial evidence: Its own public description names part of accreditation bodies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accreditation bodies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 195 accreditation bodies based in the United Kingdom

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Accreditation bodies based in the United Kingdom at a glance

As of Sep 19, 2026

31.1%Verified-email coverage

16.2Average contacts per company

1-10Median size (employees)

28.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

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 195 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among accreditation bodies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “accreditation bodies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names accreditation bodies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among accreditation bodies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 980 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Accreditation bodies by metro

Accreditation bodies in London55

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names accreditation bodies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many accreditation bodies are there based in the United Kingdom?

RevenueBase identified 195 accreditation bodies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

UKAS, headquartered in Staines-Upon-Thames, tops this list with the largest team on record.

Which city has the most accreditation bodies?

London leads with 55 headquartered companies, followed by Manchester (8) and Bromsgrove (3).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 980 verified decision-maker contacts tracked across these 195 companies.

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.

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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 Smart Search, 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.