Company lists · Data refreshed September 2026

Top 25 Oil and gas accounting firms based in the United Kingdom

Name: Oil and gas accounting 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 5, 2026 378 companies tracked

RevenueBase identified 378 oil and gas accounting firms headquartered in the United Kingdom as of September 2026 and tracks 2,020 professional contacts across them, including 642 with verified work emails and 105 with mobile numbers. London is the largest hub.

This list covers oil and gas 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 5, 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 5, 2026 86% judged on-target in blind review

378Companies

2,020Contacts tracked

642Verified emails

105Mobile numbers

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The 25 largest oil and gas accounting firms based in the United Kingdom

Ranked by team size

Top 25 of 378 oil and gas accounting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Mazars In The UK	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	505 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
2	Accord Energy Solutions Limited	Partial evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	11-50	36 contacts →
	Partial evidence “We are a highly experienced and fully independent hydrocarbon accounting consultancy, specialising in Measurement, Allocation and System Delivery projects for clients in the…” Source: RevenueBase Database · checked Sep 5, 2026
3	Gaffneycline	Strong evidence	Farnham, United KingdomHQ checked Sep 5, 2026	51-200	29 contacts →
	Strong evidence “GaffneyCline provides integrated technical and commercial consulting and independent advice on oil, gas and carbon management.” Source: RevenueBase Database · checked Sep 5, 2026
4	Hicks And Company, Chartered Accountants	Indirect evidence	Harpenden, United KingdomHQ checked Sep 5, 2026	11-50	23 contacts →
	Indirect evidence “Hicks and Company, Chartered Accountants Tax and Audit Specialists We are a local firm of accountants based in Harpenden, Hemel Hempstead and Hitchin” Source: RevenueBase Database · checked Sep 5, 2026
5	Petrovision	Indirect evidence	Fulham, United KingdomHQ checked Sep 5, 2026	11-50	20 contacts →
	Indirect evidence “PetroVision's workforce is comprised of highly qualified professionals, the principal staff have on average 20 years of industry experience in the areas of Geoscience, Engineering…” Source: RevenueBase Database · checked Sep 5, 2026
6	Beatons Group	Indirect evidence	Ipswich, United KingdomHQ checked Sep 5, 2026	11-50	19 contacts →
	Indirect evidence “A consistently progressive approach to client service keeps the Beatons Group at the forefront of local and national business.” Source: RevenueBase Database · checked Sep 5, 2026
7	Elixir Consultant UK	Strong evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	51-200	19 contacts →
	Strong evidence “ELIXIR Consultants provide market leading state-of-the art consultancy support to the oil and gas and Petrochemical industries across all lifecycle stages – from appraise through…” Source: RevenueBase Database · checked Sep 5, 2026
8	Goldblatts	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	11-50	18 contacts →
	Partial evidence “The provision of accounting, auditing, taxation services and business advice to a number of clients ranging from individuals to small, medium and large groups of privately owned…” Source: RevenueBase Database · checked Sep 5, 2026
9	Verif-I	Indirect evidence	Reading, United KingdomHQ checked Sep 5, 2026	11-50	18 contacts →
	Indirect evidence “Verif-i is a leading Integrated Seismic Survey Management company offering high-quality independent consultancy, project management and QC services aiding our clients to achieve…” Source: RevenueBase Database · checked Sep 5, 2026
10	Oilfield Production Enhancement Consulting Services Opecs LTD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	1-10	17 contacts →
	Indirect evidence “Oilfield Production Enhancement Consulting Services (OPECS) LTD is an experienced and dynamic company based in Aberdeen UK which aims to provide best in class technical…” Source: RevenueBase Database · checked Sep 5, 2026
11	Barrow LLP	Indirect evidence	Bishops Stortford, United KingdomHQ checked Sep 5, 2026	11-50	15 contacts →
	Indirect evidence “Accountants Registered Auditors Chartered Tax Advisers Business Advisers” Source: RevenueBase Database · checked Sep 5, 2026
12	Parker Russell UK	Indirect evidence	City Of London, United KingdomHQ checked Sep 5, 2026	201-500	13 contacts →
	Indirect 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 5, 2026
13	Octa Accountants	Partial evidence	Essex, United KingdomHQ checked Sep 5, 2026	1-10	13 contacts →
	Partial evidence “OCTA Accountants is one of the emerging accounting and consulting firms across the globe.” Source: RevenueBase Database · checked Sep 5, 2026
14	Adept Solutions	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	11-50	12 contacts →
	Indirect evidence “Adept Solutions is a specialist software company founded in 2006.” Source: RevenueBase Database · checked Sep 5, 2026
15	Rockflow Resources	Indirect evidence	Haslemere, United KingdomHQ checked Sep 5, 2026	11-50	12 contacts →
	Indirect evidence “Expert Upstream Advisors.” Source: RevenueBase Database · checked Sep 5, 2026
16	Lancaster Haskins Limited	Partial evidence	Wolverhampton, United KingdomHQ checked Sep 5, 2026	11-50	11 contacts →
	Partial evidence “LANCASTER HASKINS LIMITED is an accounting company based out of GRANVILLE HOUSE 2 TETTENHALL ROAD, WOLVERHAMPTON, United Kingdom.” Source: RevenueBase Database · checked Sep 5, 2026
17	EOS Europe LTD	Strong evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	11-50	11 contacts →
	Strong evidence “EOS Europe Ltd (EOS) deliver a range of specialist services to the oil and gas industry, specifically focusing on the offshore drilling and production markets.” Source: RevenueBase Database · checked Sep 5, 2026
18	Xpact Financial Accountants And Management Consultants	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	1-10	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
19	Falcon Global LTD	Partial evidence	Norwich, United KingdomHQ checked Sep 5, 2026	11-50	11 contacts →
	Partial evidence “Falcon Global serves major oil companies, engineering contractors and shipbuilders as consultants and contractors.” Source: RevenueBase Database · checked Sep 5, 2026
20	Newton Magnus LTD	Partial evidence	Broadstone, United KingdomHQ checked Sep 5, 2026	11-50	10 contacts →
	Partial evidence “Newton Magnus Ltd is an Accounting company located in 10 Station Approach, Broadstone, United Kingdom.” Source: RevenueBase Database · checked Sep 5, 2026
21	Nabaile Young UK LTD	Partial evidence	Manchester, United KingdomHQ checked Sep 5, 2026	1-10	10 contacts →
	Partial evidence “NABAILE YOUNG UK LTD is an accounting company based out of 334 SLADE LANE, MANCHESTER, United Kingdom.” Source: RevenueBase Database · checked Sep 5, 2026
22	Chartwells Accountants Limited	Partial evidence	Dudley, United KingdomHQ checked Sep 5, 2026	11-50	8 contacts →
	Partial evidence “CHARTWELLS ACCOUNTANTS LIMITED is an accounting company based out of 1 ST JOSEPHS COURT TRINDLE ROAD, DUDLEY, United Kingdom.” Source: RevenueBase Database · checked Sep 5, 2026
23	Samuels LLP	Indirect evidence	Sevenoaks, United KingdomHQ checked Sep 5, 2026	11-50	8 contacts →
	Indirect evidence “Business Advisors, Chartered Accountants, Tax Consultants, Forensic Accountants and Registered Auditors.” Source: RevenueBase Database · checked Sep 5, 2026
24	Barra Energy Limited	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 5, 2026	1-10	8 contacts →
	Indirect evidence “We are an energy company based in Aberdeen, Scotland.” Source: RevenueBase Database · checked Sep 5, 2026
25	AK Well Services	Partial evidence	Westhill, United KingdomHQ checked Sep 5, 2026	11-50	8 contacts →
	Partial evidence “AK Well Services Limited provides specialist advice and support to independent oil companies on all aspects of Drilling & Completion Fluids engineering, including associated areas…” Source: RevenueBase Database · checked Sep 5, 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: oil and gas accounting 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 oil and gas accounting firms.
Partial evidence: Its own public description names part of oil and gas accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas accounting 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 378 oil and gas accounting firms based in the United Kingdom

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Oil and gas accounting firms based in the United Kingdom at a glance

As of Sep 5, 2026

31.8%Verified-email coverage

5.2%Mobile-number coverage

5.3Average contacts per company

1-10Median size (employees)

16.4%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

286

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

6020–30

3631–60

061–90

090–180

4180+

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 oil and gas 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 “oil and gas 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 oil and gas 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 oil and gas 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, 642 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 5, 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.

Oil and gas accounting firms by metro

Oil and gas accounting firms in London62

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 oil and gas 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 oil and gas accounting firms are there based in the United Kingdom?

RevenueBase identified 378 oil and gas 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?

Mazars In The UK, headquartered in London, tops this list with the largest team on record.

Which city has the most oil and gas accounting firms?

London leads with 62 headquartered companies, followed by Aberdeen (14) and Birmingham (8).

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 642 verified decision-maker contacts tracked across these 378 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 5, 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.