Company lists · Data verified August 2026

Top 25 Clean energy consulting firms based in the United Kingdom

Name: Clean energy 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 2,056 companies tracked

There are 2,056 clean energy consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 59,974 professional contacts across them, including 21,345 with verified work emails and 7,278 with mobile numbers. London is the largest hub.

This list covers clean energy 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.

2,056Companies

59,974Contacts tracked

21,345Verified emails

7,278Mobile numbers

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The 25 largest clean energy consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 2,056 clean energy 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	WOOD	Aberdeen	10001+	27,349	8,032
2	Ricardo PLC	London	1,001-5,000	680	290
3	E CO	London	n/a	623	49
4	Dalcour Maclaren	Chesterton	501-1,000	583	405
5	ADP Consulting	London	201-500	463	270
6	Fichtner Consulting Engineers LTD	Glasgow	51-200	418	112
7	Genesis	London	501-1,000	404	183
8	Inspired PLC	Kirkham	501-1,000	374	261
9	Doris Group	Great Yarmouth	501-1,000	360	192
10	Hydrock, NOW Stantec	Hale	501-1,000	357	156
11	EIC Partnership	Redditch	51-200	315	56
12	H&z Management Consulting	London	501-1,000	287	153
13	Wardell Armstrong LLP Part Of SLR	Edinburgh	501-1,000	253	131
14	Avantis	London	501-1,000	206	68
15	Inenco Group	Lytham	501-1,000	196	57
16	Peak Wind	Scotland	201-500	185	3
17	CFP Energy	London	201-500	177	95
18	Pegasys Consulting	London	51-200	170	98
19	Consultiv Utilities	Hebburn	201-500	156	116
20	LCP Delta	Edinburgh	201-500	136	97
21	Consultus	Rochford	51-200	127	106
22	Thomas Thor	Bristol	51-200	110	36
23	The Green Energy Advice Bureau	Sunderland	51-200	98	39
24	Haven Power	Ipswich	201-500	98	18
25	Green CAT Renewables LTD	Biggar	51-200	80	56

Showing 25 of 2,056 clean energy consulting firms based in the United Kingdom

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Clean energy consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 545 HQs

7,278Contacts with mobile numbers

110Emails re-verified in last 30 days

Companies by employee count

1-10

1,353

11-50

528

51-200

116

201-500

501-1,000

1,001-5,000

10001+

Clean energy consulting firms by metro

Metro	Companies
Clean energy consulting firms in London	545
Clean energy consulting firms in Manchester	67
Clean energy consulting firms in Edinburgh	42
Clean energy consulting firms in Glasgow	41
Clean energy consulting firms in Bristol	39
Clean energy consulting firms in Leeds	27
Clean energy consulting firms in Newcastle Upon Tyne	26

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 “clean energy 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; 110 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 clean energy consulting firms are there based in the United Kingdom?

There are 2,056 clean energy consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

WOOD, headquartered in Aberdeen, tops this list with the largest team on record.

Which city has the most clean energy consulting firms?

London leads with 545 headquartered companies, followed by Manchester (67) and Edinburgh (42).

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 21,345 verified decision-maker contacts tracked across these 2,056 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.