Company lists · Data refreshed September 2026

Top 25 Exploration accounting firms based in the United Kingdom

RevenueBase identified 1,882 exploration accounting firms headquartered in the United Kingdom as of September 2026 and tracks 33,461 professional contacts across them, including 15,240 with verified work emails. London is the largest hub.

This list covers exploration accounting 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 28, 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 28, 2026 86% judged on-target in blind review
1,882Companies
33,461Contacts tracked
15,240Verified emails
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The 25 largest exploration accounting firms based in the United Kingdom

Ranked by team size
Top 25 of 1,882 exploration accounting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to exploration accounting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20265,001-10,0006,933 contacts →

Indirect evidence

“BDO LLP is an accountancy and business advisory firm that provides Audit, Tax, Deals, and Consulting, Risk & Outsourcing (CR & O) services to entrepreneurial, growing and…”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceLondon, United KingdomHQ checked Sep 28, 20261,001-5,0001,930 contacts →

Partial evidence

“As a fast growing UK accounting and advisory firm, we’ve been there, as a trusted partner, helping businesses and individuals meet challenges and seize opportunities across…”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceUk And Ireland, United KingdomHQ checked Sep 28, 20261,001-5,0001,125 contacts →

Indirect evidence

“We provide services that help businesses at every stage of the lifecycle.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceLondon, United KingdomHQ checked Sep 28, 2026501-1,000702 contacts →

Indirect evidence

“We are a fast-growing firm of accountants and business advisers based in London’s Canary Wharf, Leeds and in Manchester.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceExeter, United KingdomHQ checked Sep 28, 2026501-1,000700 contacts →

Indirect evidence

“Any good accountancy firm can help with your finance, audit, and tax.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceLondon, United KingdomHQ checked Sep 28, 2026501-1,000655 contacts →

Indirect evidence

“HaysMac is an award‑winning accountancy, tax and advisory firm, known for delivering expert, partner‑led advice to ambitious organisations and individuals.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20261,001-5,000505 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceSheffield, United KingdomHQ checked Sep 28, 2026201-500409 contacts →

Indirect evidence

“BHP is one of the largest firms of chartered accountants in Yorkshire, providing high-quality assurance, advisory, corporate finance and tax services.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceLondon, United KingdomHQ checked Sep 28, 2026201-500379 contacts →

Indirect evidence

“Welcome to the new era of accountancy.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceBirmingham, United KingdomHQ checked Sep 28, 2026501-1,000374 contacts →

Indirect evidence

“Your success matters.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceNewbury, United KingdomHQ checked Sep 28, 202651-200235 contacts →

Indirect evidence

“James Cowper Kreston is a leading firm of accountants and business advisers, with offices in Newbury, Oxford, London, Reading and Southampton.”

Source: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceLondon, United KingdomHQ checked Sep 28, 202651-200203 contacts →

Partial evidence

“Lubbock Fine is an independent accounting, tax, audit and advisory firm in the City of London.”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceExeter, United KingdomHQ checked Sep 28, 2026201-500196 contacts →

Indirect evidence

“Westcotts have been offering experienced and talented partners and specialists to support a diverse range of individuals and businesses, operating in local, national and…”

Source: RevenueBase Database · checked Sep 28, 2026
14Partial evidenceLondon, United KingdomHQ checked Sep 28, 202651-200195 contacts →

Partial evidence

“Forensic Risk Alliance (FRA) is an international consultancy that combines forensic accounting and forensic technology expertise to position businesses for success with…”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceBrighton, United KingdomHQ checked Sep 28, 2026201-500187 contacts →

Partial evidence

“Galloways is the fastest growing accounting services firm in Sussex.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceLondon, United KingdomHQ checked Sep 28, 2026201-500185 contacts →

Indirect evidence

“Sopher + Co is one of the most entrepreneurial and progressive firms of accountants, business advisers, tax and corporate finance consultants in London.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceBristol, United KingdomHQ checked Sep 28, 202651-200168 contacts →

Indirect evidence

“Milsted Langdon is an independent firm of chartered accountants in Bath, Bristol, London, Taunton and Yeovil.”

Source: RevenueBase Database · checked Sep 28, 2026
18Indirect evidenceDundee, United KingdomHQ checked Sep 28, 202651-200167 contacts →

Indirect evidence

“Chartered Accountants, Tax and Business Advisors based in Aberdeen, Dundee, Edinburgh and Glasgow.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceDroitwich, United KingdomHQ checked Sep 28, 202651-200151 contacts →

Indirect evidence

“For 40 years, Ormerod Rutter have offered the specialist hands-on support that clients need to handle all of their tax, business and financial affairs.”

Source: RevenueBase Database · checked Sep 28, 2026
20Indirect evidenceStockport, United KingdomHQ checked Sep 28, 202651-200136 contacts →

Indirect evidence

“Just imagine.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceNewport, United KingdomHQ checked Sep 28, 202651-200134 contacts →

Indirect evidence

“Award winning accountants & tax advisors based in Newport, South Wales.”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceChelmsford, United KingdomHQ checked Sep 28, 202651-200127 contacts →

Indirect evidence

“Rickard Luckin operates throughout the South East, with offices in Basildon, Chelmsford and Leigh-on-Sea.”

Source: RevenueBase Database · checked Sep 28, 2026
23Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202651-200126 contacts →

Indirect evidence

“Simmons Gainsford is a multi-disciplinary firm of chartered accountants and business advisers.”

Source: RevenueBase Database · checked Sep 28, 2026
24Partial evidenceBanbury, United KingdomHQ checked Sep 28, 202651-200120 contacts →

Partial 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 28, 2026
25Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202651-200116 contacts →

Indirect evidence

“At Harris & Trotter, we believe your accountant should do a lot more than just report on how your business is doing – he or she should help you identify opportunities to improve…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 1,882 exploration accounting firms based in the United Kingdom

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Exploration accounting firms based in the United Kingdom at a glance

As of Sep 28, 2026
45.5%Verified-email coverage
17.8Average contacts per company
1-10Median size (employees)
20.4%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
1,163
11-50
557
51-200
98
201-500
19
501-1,000
7
1,001-5,000
9
5,001-10,000
4
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 1,882 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 exploration accounting 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 “exploration accounting 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 exploration accounting 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 exploration accounting 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, 15,240 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 28, 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.

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 exploration accounting 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 exploration accounting firms are there based in the United Kingdom?

RevenueBase identified 1,882 exploration accounting 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?

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

Which city has the most exploration accounting firms?

London leads with 384 headquartered companies, followed by Birmingham (42) and Manchester (40).

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 15,240 verified decision-maker contacts tracked across these 1,882 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 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 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.