Company lists · Data refreshed September 2026

Top 25 Environmental advocacy organizations based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 103 companies tracked

RevenueBase identified 103 environmental advocacy organizations headquartered in the United Kingdom as of September 2026 and tracks 1,775 professional contacts across them, including 716 with verified work emails. London is the largest hub.

This list covers environmental advocacy organizations 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 19, 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 19, 2026 86% judged on-target in blind review

103Companies

1,775Contacts tracked

716Verified emails

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The 25 largest environmental advocacy organizations based in the United Kingdom

Ranked by team size

Top 25 of 103 environmental advocacy organizations based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental advocacy organizations: 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	Clientearth	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	324 contacts →
	Indirect evidence “We are a non-profit using the power of the law to bring about end-to-end systemic change: informing, implementing and enforcing the law, drafting and advising decision-makers on…” Source: RevenueBase Database · checked Sep 19, 2026
2	Greenpeace UK	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	167 contacts →
	Partial evidence “Greenpeace is an independent global campaigning network that acts to change attitudes and behaviour, to protect and conserve the environment and to promote peace.” Source: RevenueBase Database · checked Sep 19, 2026
3	Global Witness	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	117 contacts →
	Indirect evidence “Global Witness is an investigative, campaigning organisation.” Source: RevenueBase Database · checked Sep 19, 2026
4	Environmental Justice Foundation EJF	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	94 contacts →
	Partial evidence “The Environmental Justice Foundation (EJF) exists to protect the natural world and defend our basic human right to a secure environment.” Source: RevenueBase Database · checked Sep 19, 2026
5	Environmental Investigation Agency	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	77 contacts →
	Partial evidence “Environmental Investigation Agency UK is a UK charity, number 1182208.” Source: RevenueBase Database · checked Sep 19, 2026
6	Earthwatch Europe	Partial evidence	Oxford, United KingdomHQ checked Sep 19, 2026	51-200	52 contacts →
	Partial evidence “Earthwatch is an environmental charity with science at its heart.” Source: RevenueBase Database · checked Sep 19, 2026
7	Global Action Plan	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	44 contacts →
	Indirect evidence “Global Action Plan mobilises people and organisations to take action on the systems that harm us and our planet.” Source: RevenueBase Database · checked Sep 19, 2026
8	UKELA	Partial evidence	Uk, United KingdomHQ checked Sep 19, 2026	n/a	38 contacts →
	Partial evidence “UKELA (United Kingdom Environmental Law Association) is the UK forum which aims to make the law work for a better environment and to improve understanding and awareness of…” Source: RevenueBase Database · checked Sep 19, 2026
9	EKŌ	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	29 contacts →
	Indirect evidence “Ekō (formerly SumOfUs) is a community of people from around the world committed to curbing the growing power of corporations.” Source: RevenueBase Database · checked Sep 19, 2026
10	Bertha Earth	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “Bertha Earth is an exciting new youth-centred environmental organisation committed to co-creating a world where every child inherits a healthy, thriving planet.” Source: RevenueBase Database · checked Sep 19, 2026
11	Wildlife And Countryside Link	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Partial evidence “Wildlife and Countryside Link (Link) is the largest environment and wildlife coalition in England, bringing together 89 organisations to use their strong joint voice for the…” Source: RevenueBase Database · checked Sep 19, 2026
12	Pesticide Action Network UK	Indirect evidence	Brighton, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “We are the only UK charity focused solely on tackling the problems caused by pesticides and promoting safe and sustainable alternatives in agriculture, urban areas, homes and…” Source: RevenueBase Database · checked Sep 19, 2026
13	Fields In Trust	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Fields in Trust champions and supports our parks and green spaces by protecting them for people to enjoy in perpetuity.” Source: RevenueBase Database · checked Sep 19, 2026
14	Environmental LAW Foundation	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	18 contacts →
	Partial evidence “The Environmental Law Foundation (ELF) is a registered charity in Wales and England that was founded in 1992.” Source: RevenueBase Database · checked Sep 19, 2026
15	Gwcn Global Waste Cleaning Network	Partial evidence	Bury, United KingdomHQ checked Sep 19, 2026	51-200	15 contacts →
	Partial evidence “Global Waste Cleaning Network – GWCN is the largest and most widespread environmental network in the world.” Source: RevenueBase Database · checked Sep 19, 2026
16	Seahorse Communications	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Strategic communications for organisations driving the energy transition and restoring the natural world.” Source: RevenueBase Database · checked Sep 19, 2026
17	Protect OUR Winters UK	Partial evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “Protect Our Winters UK helps passionate outdoor people become effective climate advocates to achieve systemic solutions to climate change, protecting our world today and for…” Source: RevenueBase Database · checked Sep 19, 2026
18	Tulipshare	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	14 contacts →
	Strong evidence “Tulipshare is an activist investor and shareholder advocacy group on a mission to help investors push for stronger environmental and social commitments, using corporate governance…” Source: RevenueBase Database · checked Sep 19, 2026
19	Evoscien UK	Indirect evidence	West Midlands, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “We reimagine the world as it should be - healthy, equitable, safe.” Source: RevenueBase Database · checked Sep 19, 2026
20	FIDRA	Partial evidence	North Berwick, United KingdomHQ checked Sep 19, 2026	1-10	11 contacts →
	Partial evidence “Fidra is an environmental charity supporting sustainability & preventing pollution.” Source: RevenueBase Database · checked Sep 19, 2026
21	Videre	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “Videre's mission is to centre and elevate communities impacted by human rights abuses and environmental crimes, assisting them to lead investigations and direct evidence gathering…” Source: RevenueBase Database · checked Sep 19, 2026
22	Environmental Rights Centre For Scotland	Partial evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	1-10	10 contacts →
	Partial evidence “The Environmental Rights Centre for Scotland (ERCS) is working towards a Scotland where every person’s right to a healthy environment is respected, protected and fulfilled.” Source: RevenueBase Database · checked Sep 19, 2026
23	The Ecologist	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “For ecological, social and economic justice.” Source: RevenueBase Database · checked Sep 19, 2026
24	Lawyers For Nature	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	9 contacts →
	Indirect evidence “At Lawyers for Nature, we empower people to use the law themselves to protect nature.” Source: RevenueBase Database · checked Sep 19, 2026
25	Environmental Industries Commission EIC	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	9 contacts →
	Partial evidence “The Environmental Industries Commission (EIC) represents the companies large and small working in the environmental services and technologies sector.” Source: RevenueBase Database · checked Sep 19, 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: environmental advocacy organizations. 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 environmental advocacy organizations.
Partial evidence: Its own public description names part of environmental advocacy organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental advocacy organizations. 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 103 environmental advocacy organizations based in the United Kingdom

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Environmental advocacy organizations based in the United Kingdom at a glance

As of Sep 19, 2026

40.3%Verified-email coverage

17.2Average contacts per company

1-10Median size (employees)

44.7%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 103 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 environmental advocacy organizations, 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 “environmental advocacy organizations”. 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 environmental advocacy organizations), 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 environmental advocacy organizations, 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, 716 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 19, 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.

Environmental advocacy organizations by metro

Environmental advocacy organizations in London46

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 environmental advocacy organizations, 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 environmental advocacy organizations are there based in the United Kingdom?

RevenueBase identified 103 environmental advocacy organizations 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?

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

Which city has the most environmental advocacy organizations?

London leads with 46 headquartered companies, followed by Manchester (4) and Edinburgh (3).

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 716 verified decision-maker contacts tracked across these 103 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 19, 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.