Company lists · Data verified August 2026

Top 25 Environmental consulting firms based in the United Kingdom

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 1,223 companies tracked

There are 1,223 environmental consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 17,626 professional contacts across them, including 7,939 with verified work emails and 1,715 with mobile numbers. London is the largest hub.

This list covers environmental 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. Data current as of August 28, 2026.

1,223Companies

17,626Contacts tracked

7,939Verified emails

1,715Mobile numbers

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The 25 largest environmental consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 1,223 environmental consulting firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Exponent	London	1,001-5,000	1,561	980
2	RSK Group	Bristol	10001+	1,245	29
3	Ricardo PLC	London	1,001-5,000	680	290
4	ADP Consulting	London	201-500	463	270
5	Fairhurst	London	201-500	446	261
6	LUC	Sheffield	201-500	379	247
7	Valpak Limited	Stratford-Upon-Avon	201-500	364	264
8	Arbtech	London	51-200	217	123
9	The Erith Group	London	501-1,000	215	127
10	RSK Biocensus	Leeds	201-500	164	119
11	Aqua Consultants	Birmingham	51-200	163	99
12	Lucion	Gateshead	501-1,000	162	97
13	Arthian LTD	Anglesey	201-500	152	105
14	Eunomia Research & Consulting	London	51-200	141	100
15	Thomson Environmental Consultants	Manchester	51-200	131	88
16	The Environmental Dimension Partnership LTD	Cheltenham	51-200	124	91
17	Middlemarch	Southampton	51-200	118	70
18	Bradley Environmental Consultants Limited	Blackpool	51-200	114	69
19	The MSA Group	Cardiff	51-200	108	27
20	Life Environmental Services	Stockport Manchester	51-200	107	12
21	Acorn Analytical Services	n/a	51-200	105	36
22	AES Sustainability Consultants	Tiverton	51-200	91	70
23	Lanpro	London	51-200	86	51
24	Niras UK	Cambridge	201-500	80	44
25	CSA Environmental	Tewkesbury	51-200	76	54

Showing 25 of 1,223 environmental consulting firms based in the United Kingdom

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Environmental consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 181 HQs

1,715Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

810

11-50

281

51-200

201-500

501-1,000

1,001-5,000

10001+

Environmental consulting firms by metro

Metro	Companies
Environmental consulting firms in London	181
Environmental consulting firms in Manchester	27
Environmental consulting firms in Bristol	26
Environmental consulting firms in Glasgow	19
Environmental consulting firms in Edinburgh	17
Environmental consulting firms in Cardiff	16
Environmental consulting firms in Belfast	15

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental consulting firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental consulting firms are there based in the United Kingdom?

There are 1,223 environmental consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most environmental consulting firms?

London leads with 181 headquartered companies, followed by Manchester (27) and Bristol (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 7,939 verified decision-maker contacts tracked across these 1,223 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.