Company lists · Data refreshed September 2026

Top 25 Emissions accounting firms based in the United Kingdom

Name: Emissions 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 28, 2026 506 companies tracked

RevenueBase identified 506 emissions accounting firms headquartered in the United Kingdom as of September 2026 and tracks 17,116 professional contacts across them, including 9,283 with verified work emails. London is the largest hub.

This list covers emissions 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

506Companies

17,116Contacts tracked

9,283Verified emails

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The 25 largest emissions accounting firms based in the United Kingdom

Ranked by team size

Top 25 of 506 emissions 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 emissions 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	ERM	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	5,001-10,000	9,119 contacts →
	Indirect evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 28, 2026
2	SLR Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	3,848 contacts →
	Indirect evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 28, 2026
3	Valpak Limited	Indirect evidence	Stratford-upon-avon, United KingdomHQ checked Sep 28, 2026	201-500	347 contacts →
	Indirect evidence “Valpak, a Reconomy brand, is an EcoVadis Platinum certified leader in environmental compliance, recycling, and sustainability solutions.” Source: RevenueBase Database · checked Sep 28, 2026
4	Wardell Armstrong LLP NOW SLR	Indirect evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	501-1,000	253 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
5	ZTP	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	115 contacts →
	Indirect evidence “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Source: RevenueBase Database · checked Sep 28, 2026
6	Greengage Environmental LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	93 contacts →
	Indirect evidence “Greengage is an independent sustainability and environmental consultancy known for providing bespoke advice and working in partnership with our clients and multi-disciplinary…” Source: RevenueBase Database · checked Sep 28, 2026
7	AES Sustainability Consultants	Indirect evidence	Tiverton, United KingdomHQ checked Sep 28, 2026	51-200	92 contacts →
	Indirect evidence “AES Sustainability Consultants is a leading technical consultancy that delivers value engineered solutions across the homebuilding and construction industries.” Source: RevenueBase Database · checked Sep 28, 2026
8	Alfa Energy An Edison Energy Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	88 contacts →
	Indirect evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 28, 2026
9	Xco2	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	84 contacts →
	Indirect evidence “We are a multidisciplinary group with backgrounds in engineering, architecture and environmental science, working as consultants for buildings, large developments and masterplans…” Source: RevenueBase Database · checked Sep 28, 2026
10	FLAG	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	84 contacts →
	Indirect evidence “We're a global sustainability agency, providing strategy, communications and reporting support to the world’s leading brands.” Source: RevenueBase Database · checked Sep 28, 2026
11	clearvue.business	Indirect evidence	Gateshead, United KingdomHQ checked Sep 28, 2026	51-200	81 contacts →
	Indirect evidence “We enable businesses to succeed in the environmental components of their ESG strategies through comprehensive net zero consulting services and ground-breaking carbon and energy…” Source: RevenueBase Database · checked Sep 28, 2026
12	Ecoact Part Of Schneider Electric	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	69 contacts →
	Indirect evidence “EcoAct is now SE Advisory Services.” Source: RevenueBase Database · checked Sep 28, 2026
13	Trident Your Partner In Planet-First Energy	Indirect evidence	Blackpool, United KingdomHQ checked Sep 28, 2026	51-200	65 contacts →
	Indirect evidence “From world famous brands to multi-national industrials, we strive to make carbon net zero ambitions a reality; by benchmarking where you are today to developing a robust net zero…” Source: RevenueBase Database · checked Sep 28, 2026
14	Lucion Delta-Simons LTD	Indirect evidence	Nettleham, United KingdomHQ checked Sep 28, 2026	201-500	64 contacts →
	Indirect evidence “Now part of Lucion, Delta-Simons was established to facilitate sustainable development through multi-disciplinary environmental and health and safety consultancy advice.” Source: RevenueBase Database · checked Sep 28, 2026
15	Kinto Join Limited	Partial evidence	Epsom, United KingdomHQ checked Sep 28, 2026	51-200	61 contacts →
	Partial evidence “We help organisations understand, measure, and meaningfully reduce their environmental impact through a unique combination of expert consultancy, advanced carbon accounting…” Source: RevenueBase Database · checked Sep 28, 2026
16	Cura Terrae	Indirect evidence	Sheffield, United KingdomHQ checked Sep 28, 2026	201-500	50 contacts →
	Indirect evidence “Our mission is to provide services and solutions to help take care of the Earth.” Source: RevenueBase Database · checked Sep 28, 2026
17	Carbonxgen Limited	Indirect evidence	Sandhurst, United KingdomHQ checked Sep 28, 2026	11-50	49 contacts →
	Indirect evidence “Carbonxgen is a leading consultancy that specialises in solving complex energy and sustainability challenges.” Source: RevenueBase Database · checked Sep 28, 2026
18	WRM	Indirect evidence	Otley, United KingdomHQ checked Sep 28, 2026	11-50	47 contacts →
	Indirect evidence “Our world faces unprecedented environmental challenges - from climate change, to biodiversity loss, pollution, and unsustainable resource use.” Source: RevenueBase Database · checked Sep 28, 2026
19	Aether	Partial evidence	Oxford, United KingdomHQ checked Sep 28, 2026	11-50	45 contacts →
	Partial evidence “Aether provides consultancy in air quality and climate change emissions inventories, forecasting and policy analysis.” Source: RevenueBase Database · checked Sep 28, 2026
20	Mjca LTD	Indirect evidence	Atherstone, United KingdomHQ checked Sep 28, 2026	11-50	44 contacts →
	Indirect evidence “Delivering over 40 years of reliable environmental advice through a dedicated team of professionals committed to staying ahead of ever changing legislation and delivering…” Source: RevenueBase Database · checked Sep 28, 2026
21	Eight Versa	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	42 contacts →
	Indirect evidence “At Eight Versa, we deliver a new direction for a balanced future.” Source: RevenueBase Database · checked Sep 28, 2026
22	Carbonchain	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	42 contacts →
	Partial evidence “CarbonChain's platform enables companies to track, report and reduce their supply chain emissions, covering the most carbon-intensive industries (metals and mining, agriculture…” Source: RevenueBase Database · checked Sep 28, 2026
23	Ironside Farrar Limited	Indirect evidence	Lothian, United KingdomHQ checked Sep 28, 2026	51-200	41 contacts →
	Indirect evidence “Environmental Consultants.” Source: RevenueBase Database · checked Sep 28, 2026
24	Energise B Corp	Indirect evidence	St Neots, United KingdomHQ checked Sep 28, 2026	11-50	39 contacts →
	Indirect evidence “We are Energise – your sustainability partner.” Source: RevenueBase Database · checked Sep 28, 2026
25	Fourfront Group	Indirect evidence	Windsor, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Indirect evidence “Fourfront Group are a family of businesses with one united vision.” Source: RevenueBase Database · checked Sep 28, 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: emissions 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 emissions accounting firms.
Partial evidence: Its own public description names part of emissions accounting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name emissions 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 506 emissions accounting firms based in the United Kingdom

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Emissions accounting firms based in the United Kingdom at a glance

As of Sep 28, 2026

54.2%Verified-email coverage

33.8Average contacts per company

1-10Median size (employees)

35.6%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

361

11-50

105

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 506 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 emissions 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 “emissions 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 emissions 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 emissions 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, 9,283 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.

Emissions accounting firms by metro

Emissions accounting firms in London180

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

RevenueBase identified 506 emissions 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?

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

Which city has the most emissions accounting firms?

London leads with 180 headquartered companies, followed by Manchester (15) and Bristol (14).

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 9,283 verified decision-maker contacts tracked across these 506 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.