Company lists · Data refreshed September 2026

Top 25 Quality management system consultants based in the United Kingdom

Name: Quality management system consultants based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 665 companies tracked

RevenueBase identified 665 quality management system consultants headquartered in the United Kingdom as of September 2026 and tracks 3,455 professional contacts across them, including 1,041 with verified work emails. London is the largest hub.

This list covers quality management system consultants 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 21, 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 21, 2026 86% judged on-target in blind review

665Companies

3,455Contacts tracked

1,041Verified emails

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The 25 largest quality management system consultants based in the United Kingdom

Ranked by team size

Top 25 of 665 quality management system consultants based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to quality management system consultants: 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	The Citation Group	Partial evidence	Wilmslow, United KingdomHQ checked Sep 21, 2026	1,001-5,000	291 contacts →
	Partial evidence “The Citation Group offer unrivalled compliance and quality services to over businesses across the UK, Australia, New Zealand, and Canada.” Source: RevenueBase Database · checked Sep 21, 2026
2	NQA	Indirect evidence	Dunstable, United KingdomHQ checked Sep 21, 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 21, 2026
3	G&p Quality Management Group	Strong evidence	Birmingham, United KingdomHQ checked Sep 21, 2026	1,001-5,000	196 contacts →
	Strong evidence “Established in 1994, G&P is a world-leading provider of quality management services to the manufacturing industry, primarily in the automotive, aerospace and off-highway sectors.” Source: RevenueBase Database · checked Sep 21, 2026
4	Rephine	Partial evidence	Stevenage, United KingdomHQ checked Sep 21, 2026	51-200	102 contacts →
	Partial evidence “Global experts in quality assurance & GxP compliance across pharmaceutical, biotech & medical device manufacturing supply chains Who is Rephine?” Source: RevenueBase Database · checked Sep 21, 2026
5	Isoqar	Indirect evidence	Manchester, United KingdomHQ checked Sep 21, 2026	51-200	99 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 21, 2026
6	FQM LTD	Strong evidence	Glasgow, United KingdomHQ checked Sep 21, 2026	11-50	52 contacts →
	Strong evidence “FQM is a #QHSE (#Quality,#Health,#Safety,#Security and #Environmental compliance software, consultancy, coaching & training organisation, focused on delivering cost effective…” Source: RevenueBase Database · checked Sep 21, 2026
7	International Associates Limited	Indirect evidence	Glasgow, United KingdomHQ checked Sep 21, 2026	51-200	50 contacts →
	Indirect evidence “International Associates (IA) is a leading provider of assessment, audit, verification, certification and training services.” Source: RevenueBase Database · checked Sep 21, 2026
8	SPGL	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	45 contacts →
	Indirect evidence “ABOUT US Who Are We?” Source: RevenueBase Database · checked Sep 21, 2026
9	ISO Quality Services LTD ISO QSL	Strong evidence	Worcester, United KingdomHQ checked Sep 21, 2026	11-50	37 contacts →
	Strong evidence “ISO Quality Services Limited specialise in helping businesses improve through the implementation of ISO and BS EN Management Standards, ISO consultancy and ISO training, helping…” Source: RevenueBase Database · checked Sep 21, 2026
10	CS Lifesciences	Partial evidence	Glasgow, United KingdomHQ checked Sep 21, 2026	11-50	35 contacts →
	Partial evidence “CS Lifesciences is an award-winning enterprise regulatory strategy consultancy, rated #1 in the US, and trusted by Fortune 500 companies, leading medtech firms, and diagnostics…” Source: RevenueBase Database · checked Sep 21, 2026
11	Clear Quality Limited	Strong evidence	Rotherham, United KingdomHQ checked Sep 21, 2026	11-50	28 contacts →
	Strong evidence “Clear Quality is a professional ISO Consultancy business and Prime Training provider based in South Yorkshire.” Source: RevenueBase Database · checked Sep 21, 2026
12	TPT Consultancy & Training LTD	Partial evidence	Merthyr Tydfil, United KingdomHQ checked Sep 21, 2026	1-10	21 contacts →
	Partial evidence “TPT is a leading provider of training and consultancy, serving customers around the world.” Source: RevenueBase Database · checked Sep 21, 2026
13	Riverark Limited	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong evidence “RiverArk is a Global Quality Consultancy providing comprehensive services in GxP domain.” Source: RevenueBase Database · checked Sep 21, 2026
14	Bemcon	Partial evidence	Manchester, United KingdomHQ checked Sep 21, 2026	51-200	19 contacts →
	Partial evidence “Business Excellence & Management Consortium (BEMCON) is a professional training, consulting, and auditing organization specializing in ISO standards, occupational health & safety…” Source: RevenueBase Database · checked Sep 21, 2026
15	CQS Certified Quality Systems Limited	Strong evidence	Malvern, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Strong evidence “CQS (Certified Quality Systems) Ltd delivers straightforward, practical ISO certification with over 25 years of experience.” Source: RevenueBase Database · checked Sep 21, 2026
16	Challengecurve	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Partial evidence “ChallengeCurve helps organisations embrace innovation and transformation with confidence and courage by designing and implementing customised quality assurance strategies.” Source: RevenueBase Database · checked Sep 21, 2026
17	Premier Advisory Group	Strong evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	18 contacts →
	Strong evidence “Premier Advisory Group is certified to ISO Standard 9001:2015 for the provision of management consultancy, our core objective has always been to drive and support continual…” Source: RevenueBase Database · checked Sep 21, 2026
18	Aviso Consultancy LTD	Strong evidence	Southwark, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Strong evidence “AvISO Consultancy helps organisations build management systems that genuinely work in practice.” Source: RevenueBase Database · checked Sep 21, 2026
19	Blackmores UK LTD	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	11-50	17 contacts →
	Indirect evidence “ISO Standards can help you improve efficiency, reduce costs and increase tender opportunities.” Source: RevenueBase Database · checked Sep 21, 2026
20	The QSS Group LTD	Strong evidence	Hilton, United KingdomHQ checked Sep 21, 2026	11-50	16 contacts →
	Strong evidence “The QSS Group Limited is a leading provider of cost effective and customer focussed- Management Consultancy - Business Risk - Safety Risk - Environmental Risk - Training -…” Source: RevenueBase Database · checked Sep 21, 2026
21	Bywater	Strong evidence	Esher, United KingdomHQ checked Sep 21, 2026	11-50	16 contacts →
	Strong evidence “Our goal is to help organisations run more effective management systems, improve the quality of their products and services, and support them in achieving their own goals.” Source: RevenueBase Database · checked Sep 21, 2026
22	Tower Mains	Strong evidence	Edinburgh, United KingdomHQ checked Sep 21, 2026	11-50	14 contacts →
	Strong evidence “Founded in 2001 by Dr Andrew Waddell, Tower Mains Ltd offers bespoke audit, consultancy, training, and quality assurance services to the clinical, healthcare, life sciences…” Source: RevenueBase Database · checked Sep 21, 2026
23	Quadra LTD	Strong evidence	Holywood, United KingdomHQ checked Sep 21, 2026	11-50	13 contacts →
	Strong evidence “Quadra is a management systems consultancy and training organisation specialising in implementing management systems to international standards to include: Quality (ISO…” Source: RevenueBase Database · checked Sep 21, 2026
24	Qhse Aberdeen Limited	Strong evidence	Aberdeen, United KingdomHQ checked Sep 21, 2026	1-10	13 contacts →
	Strong evidence “QHSE Aberdeen provide a Consultancy, Advisory & Training Service to companies that require assistance in the areas of Quality, Heath & Safety, Environmental, Audits, ISO…” Source: RevenueBase Database · checked Sep 21, 2026
25	Twosb Management Systems	Strong evidence	Maidstone, United KingdomHQ checked Sep 21, 2026	1-10	13 contacts →
	Strong evidence “We support a wide range of manufacturing, technology, service and construction businesses in the implementation of UKAS accredited ISO Management System Standards.” Source: RevenueBase Database · checked Sep 21, 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: quality management system consultants. 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 quality management system consultants.
Partial evidence: Its own public description names part of quality management system consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name quality management system consultants. 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 665 quality management system consultants based in the United Kingdom

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Quality management system consultants based in the United Kingdom at a glance

As of Sep 21, 2026

30.1%Verified-email coverage

5.2Average contacts per company

1-10Median size (employees)

12.6%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

557

11-50

51-200

201-500

501-1,000

1,001-5,000

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 665 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 quality management system consultants, 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 “quality management system consultants”. 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 quality management system consultants), 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 quality management system consultants, 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, 1,041 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 21, 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.

Quality management system consultants by metro

Quality management system consultants in London84

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 quality management system consultants, 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 quality management system consultants are there based in the United Kingdom?

RevenueBase identified 665 quality management system consultants 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?

The Citation Group, headquartered in Wilmslow, tops this list with the largest team on record.

Which city has the most quality management system consultants?

London leads with 84 headquartered companies, followed by Manchester (18) and Aberdeen (13).

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 1,041 verified decision-maker contacts tracked across these 665 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 21, 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.