Company lists · Data refreshed September 2026

Top 25 Association business consulting firms based in the United Kingdom

Name: Association business consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 1,804 companies tracked

RevenueBase identified 1,804 association business consulting firms headquartered in the United Kingdom as of September 2026 and tracks 9,369 professional contacts across them, including 3,009 with verified work emails and 682 with mobile numbers. London is the largest hub.

This list covers association business consulting firms 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 23, 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 23, 2026 86% judged on-target in blind review

1,804Companies

9,369Contacts tracked

3,009Verified emails

682Mobile numbers

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The 25 largest association business consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,804 association business consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to association business consulting firms: 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	Quantuma	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	201-500	277 contacts →
	Indirect evidence “Quantuma is a leading business advisory firm which works with businesses at the key milestones.” Source: RevenueBase Database · checked Sep 23, 2026
2	Elixirr	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	501-1,000	275 contacts →
	Partial evidence “An award-winning global consulting firm working with clients across a diverse range of markets, industries and geographies.” Source: RevenueBase Database · checked Sep 23, 2026
3	Ellisons	Indirect evidence	Colchester, United KingdomHQ checked Sep 23, 2026	201-500	258 contacts →
	Indirect evidence “Ellisons is one of the region’s oldest, most established and fastest growing firms.” Source: RevenueBase Database · checked Sep 23, 2026
4	Oury Clark	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	171 contacts →
	Indirect evidence “Our pioneering integrated approach to professional services cuts through the complicated layers of the legal and accountancy world to give you straightforward joined-up advice and…” Source: RevenueBase Database · checked Sep 23, 2026
5	Ellacotts Accountants	Indirect evidence	Banbury, United KingdomHQ checked Sep 23, 2026	51-200	120 contacts →
	Indirect evidence “Ellacotts is one of the largest independent accounting and business advisory firms in the UK and is ranked as a Top 100 Accountancy Firm by Accountancy Age.” Source: RevenueBase Database · checked Sep 23, 2026
6	Hentons	Indirect evidence	Leeds, United KingdomHQ checked Sep 23, 2026	51-200	109 contacts →
	Indirect evidence “We have over 40 years of experience and pride ourselves on understanding our clients, their businesses, and the issues they face, no matter how big or small.” Source: RevenueBase Database · checked Sep 23, 2026
7	Definition	Indirect evidence	West End, United KingdomHQ checked Sep 23, 2026	51-200	97 contacts →
	Indirect evidence “We’re specialists, not generalists We built our business by bringing together different specialists – strategists, creatives, makers, technologists and more.” Source: RevenueBase Database · checked Sep 23, 2026
8	K3 Capital Group	Indirect evidence	Manchester, United KingdomHQ checked Sep 23, 2026	501-1,000	97 contacts →
	Indirect evidence “K3 Capital Group is a professional services firm providing advisory services to SMEs throughout the UK and overseas.” Source: RevenueBase Database · checked Sep 23, 2026
9	BDO Northern Ireland	Indirect evidence	Belfast, United KingdomHQ checked Sep 23, 2026	51-200	93 contacts →
	Indirect evidence “BDO NI specialises in helping businesses, whether start-ups or multinationals, to grow.” Source: RevenueBase Database · checked Sep 23, 2026
10	HJS Accountants	Indirect evidence	Southampton, United KingdomHQ checked Sep 23, 2026	51-200	77 contacts →
	Indirect evidence “If you are looking for a team of reliable, approachable, and proactive accountants and business advisers, who will work alongside you to help you succeed, then we can help.” Source: RevenueBase Database · checked Sep 23, 2026
11	MG Group	Partial evidence	Harrow, United KingdomHQ checked Sep 23, 2026	11-50	73 contacts →
	Partial evidence “MG Group is a multi-disciplinary practice providing accounting, tax, audit, legal and business consulting services.” Source: RevenueBase Database · checked Sep 23, 2026
12	Excalibur Communications	Partial evidence	Swindon, United KingdomHQ checked Sep 23, 2026	51-200	72 contacts →
	Partial evidence “Excalibur provides an end to end business consulting service that offers reliable insight, and expertise in communications and technology.” Source: RevenueBase Database · checked Sep 23, 2026
13	WEM & CO Chartered Accountants	Indirect evidence	East Acton, United KingdomHQ checked Sep 23, 2026	11-50	72 contacts →
	Indirect evidence “Welcome to Wem & Co Are you looking for an innovative firm of chartered accountants and business development specialists who can help you improve the performance and profitability…” Source: RevenueBase Database · checked Sep 23, 2026
14	Sharma & CO	Indirect evidence	Birmingham, United KingdomHQ checked Sep 23, 2026	n/a	71 contacts →
	Indirect evidence “Sharma & Co operates from offices in Birmingham, London and Manchester delivering practical and cost effective advice.” Source: RevenueBase Database · checked Sep 23, 2026
15	HWB Chartered Accountants	Indirect evidence	Chandlers Ford, United KingdomHQ checked Sep 23, 2026	51-200	70 contacts →
	Indirect evidence “HWB is a leading firm of Chartered Accountants offering the depth of resource and specialist skills of a national practice.” Source: RevenueBase Database · checked Sep 23, 2026
16	Camelot	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	66 contacts →
	Indirect evidence “We are a network of independent consultants who are ex-C-Suite Execs/Senior Managers who have all been there and done it in top organisations, mainly in insurance but others as…” Source: RevenueBase Database · checked Sep 23, 2026
17	GCE	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	51-200	57 contacts →
	Indirect evidence “Are you looking to maximize your business relationships across the globe?” Source: RevenueBase Database · checked Sep 23, 2026
18	Management Consultancies Association	Partial evidence	London, United KingdomHQ checked Sep 23, 2026	11-50	52 contacts →
	Partial evidence “The Management Consultancies Association (MCA) is the representative body for management consultancy firms in the UK.” Source: RevenueBase Database · checked Sep 23, 2026
19	Managing Partners' Forum	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	n/a	50 contacts →
	Indirect evidence “Managing Partners' Forum is a membership organisation dedicated to helping professional firms grow by providing insights to improve performance, increase profitability and prepare…” Source: RevenueBase Database · checked Sep 23, 2026
20	Moore Kingston Smith Herts Beds Bucks	Indirect evidence	St Albans, United KingdomHQ checked Sep 23, 2026	51-200	46 contacts →
	Indirect evidence “We proudly announce that WMT has joined forces with Moore Kingston Smith, creating a stronger, unified team with shared values and a commitment to excellence.” Source: RevenueBase Database · checked Sep 23, 2026
21	TGFP	Indirect evidence	Leamington Spa, United KingdomHQ checked Sep 23, 2026	11-50	45 contacts →
	Indirect evidence “Complete business accounting With our experience and resources, we offer our clients support in business development including preparation of business plans, growth strategy and…” Source: RevenueBase Database · checked Sep 23, 2026
22	Saint & CO	Indirect evidence	Carlisle, United KingdomHQ checked Sep 23, 2026	51-200	43 contacts →
	Indirect evidence “Saint & Co is a firm of Chartered Accountants, Taxation Experts, Independent Financial Advisers and Professional Business Advisers specialising in helping business owners…” Source: RevenueBase Database · checked Sep 23, 2026
23	Q4accounting	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	11-50	43 contacts →
	Indirect evidence “Q4 Accounting is a powerful network of efficient and eminent accounting professionals.” Source: RevenueBase Database · checked Sep 23, 2026
24	R.E.P.R.E.S.E.N.T	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 23, 2026	51-200	42 contacts →
	Indirect evidence “You run an accountancy practice.” Source: RevenueBase Database · checked Sep 23, 2026
25	Kindleworth LLP	Indirect evidence	London, United KingdomHQ checked Sep 23, 2026	11-50	40 contacts →
	Indirect evidence “Kindleworth has launched and managed some of the boldest and most successful new law firms of the last decade, in the UK and across the globe.” Source: RevenueBase Database · checked Sep 23, 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: association business consulting firms. 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 association business consulting firms.
Partial evidence: Its own public description names part of association business consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name association business consulting firms. 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 1,804 association business consulting firms based in the United Kingdom

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Association business consulting firms based in the United Kingdom at a glance

As of Sep 23, 2026

32.1%Verified-email coverage

7.3%Mobile-number coverage

5.2Average contacts per company

1-10Median size (employees)

35.3%Largest-city concentration · London

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

1,428

11-50

278

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

2,2480–30

71431–60

3961–90

190–180

7180+

Company record updated

Median 86.0d

00–30

1,28831–60

4,67961–90

2,81090–180

592180+

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 association business consulting firms, 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 “association business consulting firms”. 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 association business consulting firms), 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 association business consulting firms, 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, 3,009 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 23, 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.

Association business consulting firms by metro

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 association business consulting firms, 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 association business consulting firms are there based in the United Kingdom?

RevenueBase identified 1,804 association business consulting firms 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?

Quantuma, headquartered in London, tops this list with the largest team on record.

Which city has the most association business consulting firms?

London leads with 637 headquartered companies, followed by Manchester (44) and Birmingham (26).

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 3,009 verified decision-maker contacts tracked across these 1,804 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 23, 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.