Company lists · Data refreshed September 2026

Top 25 Internal audit consulting firms based in the United Kingdom

Name: Internal audit 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 4, 2026 190 companies tracked

RevenueBase identified 190 internal audit consulting firms headquartered in the United Kingdom as of September 2026 and tracks 12,162 professional contacts across them, including 4,294 with verified work emails and 3,037 with mobile numbers. London is the largest hub.

This list covers internal audit 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 4, 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 4, 2026 86% judged on-target in blind review

190Companies

12,162Contacts tracked

4,294Verified emails

3,037Mobile numbers

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The 25 largest internal audit consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 190 internal audit consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 4, 2026. RevenueBase Smart Search rates how each company's information relates to internal audit 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	Crowe UK	Strong evidence	London, United KingdomHQ checked Sep 4, 2026	1,001-5,000	1,381 contacts →
	Strong evidence “Crowe UK is a leading audit, tax, advisory and consulting firm with a national presence to complement our international reach.” Source: RevenueBase Database · checked Sep 4, 2026
2	Mazars In The UK	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	1,001-5,000	516 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 4, 2026
3	Tiaa LTD	Indirect evidence	Fareham, United KingdomHQ checked Sep 4, 2026	51-200	115 contacts →
	Indirect evidence “Relax.” Source: RevenueBase Database · checked Sep 4, 2026
4	Swap Internal Audit Services	Strong evidence	Taunton, United KingdomHQ checked Sep 4, 2026	51-200	72 contacts →
	Strong evidence “SWAP is a well established not for profit organisation that focuses on internal audit but also offers a variety of independent business improvement and assurance services designed…” Source: RevenueBase Database · checked Sep 4, 2026
5	Adams & Moore	Indirect evidence	Dartford, United KingdomHQ checked Sep 4, 2026	51-200	51 contacts →
	Indirect evidence “Adams & Moore is a professional firm of Auditors, Tax and Professional Advisors offering a comprehensive range of accounting, compliance, financial and business advisory services…” Source: RevenueBase Database · checked Sep 4, 2026
6	Auditone UK	Strong evidence	Durham, United KingdomHQ checked Sep 4, 2026	51-200	27 contacts →
	Strong evidence “Providing internal audit, technology risk assurance and counter fraud services in the North of England.” Source: RevenueBase Database · checked Sep 4, 2026
7	KBM Group	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	51-200	25 contacts →
	Partial evidence “KBM Group was founded as a Chartered Certified Accountancy firm, offering advisory and consulting services for business start-ups and organizations looking to strengthen their…” Source: RevenueBase Database · checked Sep 4, 2026
8	Independent Audit Limited	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	23 contacts →
	Partial evidence “Independent Audit are leading specialists in governance, risk and assurance.” Source: RevenueBase Database · checked Sep 4, 2026
9	Pathlight Associates	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	20 contacts →
	Partial evidence “What we do We are a specialist professional services firm providing consulting and assurance services, particularly to the Financial Services sector.” Source: RevenueBase Database · checked Sep 4, 2026
10	Validera	Strong evidence	Burntwood, United KingdomHQ checked Sep 4, 2026	11-50	17 contacts →
	Strong evidence “Specialist internal audit, governance, risk and compliance services provider; helping our clients Improve, Comply and Optimise.” Source: RevenueBase Database · checked Sep 4, 2026
11	Recsel International	Strong evidence	London, United KingdomHQ checked Sep 4, 2026	1-10	17 contacts →
	Strong evidence “RecSel International is the specialist recruitment consultancy for audit jobs across Europe.” Source: RevenueBase Database · checked Sep 4, 2026
12	Mirador Solutions Consultancy	Indirect evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	16 contacts →
	Indirect evidence “Trusted Partner to the Financial Services From the business, to your business Mirador Solutions Consultancy is a trusted and strategic partner for financial services firms, with…” Source: RevenueBase Database · checked Sep 4, 2026
13	UHY BPR Heaton Chartered Accountants	Indirect evidence	Leeds, United KingdomHQ checked Sep 4, 2026	11-50	14 contacts →
	Indirect evidence “UHY BPR Heaton can trace its roots back to the 1920's and by focusing on looking after our clients we are now one of the largest independent chartered practices in the Yorkshire…” Source: RevenueBase Database · checked Sep 4, 2026
14	Riskbase	Indirect evidence	United KingdomHQ checked Sep 4, 2026	11-50	14 contacts →
	Indirect evidence “RiskBase helps larger consultancies and groups manage every stage of the compliance process, from creating Fire Risk Assessments through to completing remedial actions and…” Source: RevenueBase Database · checked Sep 4, 2026
15	Parker Russell UK	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	201-500	13 contacts →
	Partial evidence “Parker Russell is a leading audit firm offering comprehensive services to medium to large corporations, specialising in FCA-regulated environments and stock exchange-listed…” Source: RevenueBase Database · checked Sep 4, 2026
16	John Williams	Indirect evidence	Reigate, United KingdomHQ checked Sep 4, 2026	11-50	13 contacts →
	Indirect evidence “We are registered auditors and have a wide experience in reporting under the Companies Act and the special rules which govern solicitors.” Source: RevenueBase Database · checked Sep 4, 2026
17	Mills Pyatt LTD	Partial evidence	Redditch, United KingdomHQ checked Sep 4, 2026	1-10	12 contacts →
	Partial evidence “Mills Pyatt a professional Audit & Accounting firm based centrally in the UK, just south of Birmingham.” Source: RevenueBase Database · checked Sep 4, 2026
18	Octa Accountants	Partial evidence	Ilford, United KingdomHQ checked Sep 4, 2026	1-10	12 contacts →
	Partial evidence “OCTA Accountants is one of the emerging accounting and consulting firms across the globe.” Source: RevenueBase Database · checked Sep 4, 2026
19	Accounting Crunchers Limited	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	1-10	12 contacts →
	Partial evidence “Accounting Crunchers Limited is a full-service business consulting and advisory firm with a global presence in the UAE, UK, Canada, and USA.” Source: RevenueBase Database · checked Sep 4, 2026
20	Cube Partners Limited	Indirect evidence	Northampton, United KingdomHQ checked Sep 4, 2026	11-50	11 contacts →
	Indirect evidence “Cube Partners Limited is a firm of Chartered Accountants and Registered Auditors, regulated by the Institute of Chartered Accountants in England & Wales.” Source: RevenueBase Database · checked Sep 4, 2026
21	Zenith Audit UK LTD	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	1-10	11 contacts →
	Partial evidence “Zenith Audit UK is a specialist audit firm delivering assurance and risk management services to SMEs in the financial services industry and beyond.” Source: RevenueBase Database · checked Sep 4, 2026
22	Evolve North LTD	Indirect evidence	Richmond, United KingdomHQ checked Sep 4, 2026	11-50	9 contacts →
	Indirect evidence “Evolve North is a specialist consultancy with subject matter expertise founded in Governance, Risk, and Compliance as well as IT Security and Assurance.” Source: RevenueBase Database · checked Sep 4, 2026
23	Xcina Consulting	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	9 contacts →
	Partial evidence “At Xcina Consulting we leverage a deep and experienced pool of skilled consultants to deliver all our assurance and advisory services.” Source: RevenueBase Database · checked Sep 4, 2026
24	Exsus Audit	Partial evidence	London, United KingdomHQ checked Sep 4, 2026	11-50	9 contacts →
	Partial evidence “EXSUS AUDITis offering a comprehensive range of accounting, auditing, tax planning and business consulting services to Cypriot and offshore companies and high net worth…” Source: RevenueBase Database · checked Sep 4, 2026
25	Murray Harcourt	Partial evidence	Leeds, United KingdomHQ checked Sep 4, 2026	51-200	8 contacts →
	Partial evidence “Murray Harcourt is an independent firm of audit, tax and risk management specialists with a passion for being a commercial, proactive and forward-thinking client resource.” Source: RevenueBase Database · checked Sep 4, 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: internal audit 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 internal audit consulting firms.
Partial evidence: Its own public description names part of internal audit consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internal audit 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 190 internal audit consulting firms based in the United Kingdom

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

As of Sep 4, 2026

35.3%Verified-email coverage

25.0%Mobile-number coverage

64.0Average contacts per company

1-10Median size (employees)

40.5%Largest-city concentration · London

Sep 4, 2026Page data refreshed

Companies by employee count

1-10

125

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

30131–60

2,34861–90

1,63290–180

13180+

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 internal audit 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 “internal audit 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 internal audit 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 internal audit 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, 4,294 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 4, 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.

Internal audit consulting firms by metro

Internal audit consulting firms in London77

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 internal audit 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 internal audit consulting firms are there based in the United Kingdom?

RevenueBase identified 190 internal audit 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?

Crowe UK, headquartered in Birmingham, tops this list with the largest team on record.

Which city has the most internal audit consulting firms?

London leads with 77 headquartered companies, followed by Birmingham (4) and Leeds (4).

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 4,294 verified decision-maker contacts tracked across these 190 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 4, 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.