Company lists · Data refreshed September 2026

Top 25 Ecological consulting firms based in the United Kingdom

Name: Ecological consulting 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 1, 2026 927 companies tracked

RevenueBase identified 927 ecological consulting firms headquartered in the United Kingdom as of September 2026 and tracks 13,186 professional contacts across them, including 6,661 with verified work emails and 1,487 with mobile numbers. London is the largest hub.

This list covers ecological 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

927Companies

13,186Contacts tracked

6,661Verified emails

1,487Mobile numbers

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The 25 largest ecological consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 927 ecological consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to ecological consulting 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	Exponent	Partial evidence	London, United Kingdom	1,001-5,000	1,561 contacts →
	Partial evidence “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Source: RevenueBase Database · checked Sep 1, 2026
2	Ricardo PLC	Indirect evidence	London, United Kingdom	1,001-5,000	680 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 1, 2026
3	ADP Consulting	Partial evidence	London, United Kingdom	201-500	463 contacts →
	Partial evidence “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Source: RevenueBase Database · checked Sep 1, 2026
4	Fairhurst	Partial evidence	London, United Kingdom	201-500	446 contacts →
	Partial evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 1, 2026
5	LUC	Indirect evidence	Sheffield, United Kingdom	201-500	379 contacts →
	Indirect evidence “LUC is an independent, employee-owned environmental consultancy celebrating its 60th anniversary.” Source: RevenueBase Database · checked Sep 1, 2026
6	Atelier TEN	Indirect evidence	London, United Kingdom	51-200	321 contacts →
	Indirect evidence “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Source: RevenueBase Database · checked Sep 1, 2026
7	Arbtech	Partial evidence	London, United Kingdom	51-200	217 contacts →
	Partial evidence “Founded in 2005, Arbtech has grown into the UK's leading arboricultural and ecological consultancy.” Source: RevenueBase Database · checked Sep 1, 2026
8	The Erith Group	Partial evidence	London, United Kingdom	501-1,000	215 contacts →
	Partial evidence “Supported by a network of specialist consulting engineers, environmentalists and our own collective experience, our philosophy is simple: to provide a qualitative economic and…” Source: RevenueBase Database · checked Sep 1, 2026
9	RSK Biocensus	Partial evidence	Leeds, United Kingdom	201-500	164 contacts →
	Partial evidence “RSK Biocensus is an ecological consultancy with a presence across the country and an extensive network of ecologists throughout the UK.” Source: RevenueBase Database · checked Sep 1, 2026
10	Aqua Consultants	Indirect evidence	Birmingham, United Kingdom	51-200	163 contacts →
	Indirect evidence “Aqua Consultants provide tailored environmental consultancy to broaden your thinking, lead transformation, and achieve successful outcomes.” Source: RevenueBase Database · checked Sep 1, 2026
11	Lucion	Indirect evidence	Gateshead, United Kingdom	501-1,000	162 contacts →
	Indirect evidence “We're not just service providers; we're your long-term partners in creating a sustainable, compliant, and efficient future for your assets.” Source: RevenueBase Database · checked Sep 1, 2026
12	Arthian LTD	Partial evidence	Anglesey, United Kingdom	201-500	152 contacts →
	Partial evidence “Arthian has been established following a merger between Mabbett and IKM Consulting.” Source: RevenueBase Database · checked Sep 1, 2026
13	Jasco Applied Sciences	Partial evidence	Droxford, United Kingdom	51-200	142 contacts →
	Partial evidence “JASCO Applied Sciences (formerly JASCO Research) is an international company with over 25 years experience providing consulting services in underwater acoustics and other physical…” Source: RevenueBase Database · checked Sep 1, 2026
14	Tyler Grange B Corp	Indirect evidence	London, United Kingdom	51-200	137 contacts →
	Indirect evidence “All environmental planning projects great and small.” Source: RevenueBase Database · checked Sep 1, 2026
15	Thomson Environmental Consultants	Indirect evidence	Manchester, United Kingdom	51-200	131 contacts →
	Indirect evidence “Thomson Environmental Consultants are experts in environmental compliance with offices in Guildford, Leeds, Cardiff, Birmingham and Manchester.” Source: RevenueBase Database · checked Sep 1, 2026
16	The Environmental Dimension Partnership LTD	Indirect evidence	Cheltenham, United Kingdom	51-200	124 contacts →
	Indirect evidence “At EDP we help develop extraordinary places + people.” Source: RevenueBase Database · checked Sep 1, 2026
17	Middlemarch	Indirect evidence	Southampton, United Kingdom	51-200	118 contacts →
	Indirect evidence “With a legacy of over 30 years, we are a UK leading independent consultancy specialising in the preservation of the natural environment.” Source: RevenueBase Database · checked Sep 1, 2026
18	Greengage Environmental LTD	Indirect evidence	Manchester, United Kingdom	51-200	92 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 1, 2026
19	AES Sustainability Consultants	Indirect evidence	Tiverton, United Kingdom	51-200	91 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 1, 2026
20	Cura Terrae Land & Nature	Indirect evidence	Sheffield, United Kingdom	51-200	90 contacts →
	Indirect evidence “Our multidisciplinary teams work together to combine their expertise in ecology, the historic environment, environmental impact assessment, landscape architecture, habitat…” Source: RevenueBase Database · checked Sep 1, 2026
21	Lanpro	Indirect evidence	London, United Kingdom	51-200	86 contacts →
	Indirect evidence “We are planning led multi-disciplinary environment consultants.” Source: RevenueBase Database · checked Sep 1, 2026
22	CSA Environmental	Indirect evidence	Tewkesbury, United Kingdom	51-200	76 contacts →
	Indirect evidence “CSA Environmental is a multidisciplinary environmental consultancy practice providing specialist advice covering Ecology, Heritage, Landscape, and Masterplanning and Urban Design.” Source: RevenueBase Database · checked Sep 1, 2026
23	Ocean Ecology LTD	Indirect evidence	Gloucester, United Kingdom	51-200	76 contacts →
	Indirect evidence “Ocean Ecology Limited is a leading marine environmental consultancy specialising in providing survey, technical, data and advisory services to organisations delivering and…” Source: RevenueBase Database · checked Sep 1, 2026
24	Rappor	Indirect evidence	Bristol, United Kingdom	51-200	75 contacts →
	Indirect evidence “Rappor is an engineering and environmental consultancy working in partnership to steer sustainable development solutions.” Source: RevenueBase Database · checked Sep 1, 2026
25	Rammsanderson Ecology LTD	Partial evidence	Stafford, United Kingdom	51-200	74 contacts →
	Partial evidence “RammSanderson Ecology Ltd is a specialist ecological consultancy based at offices in the East Midlands, West Midlands, Yorkshire, North West, South West and South East, offering…” Source: RevenueBase Database · checked Sep 1, 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: ecological consulting 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 ecological consulting firms.
Partial evidence: Its own public description names part of ecological consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ecological consulting 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 927 ecological consulting firms based in the United Kingdom

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Ecological consulting firms based in the United Kingdom at a glance

As of Sep 1, 2026

50.5%Verified-email coverage

11.3%Mobile-number coverage

14.2Average contacts per company

1-10Median size (employees)

10.2%Largest-city concentration · London

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

625

11-50

219

51-200

201-500

501-1,000

1,001-5,000

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 ecological consulting 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 “ecological consulting 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 ecological consulting 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 ecological consulting 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, 6,661 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 1, 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.

Ecological consulting firms by metro

Ecological consulting firms in London95

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 ecological consulting 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 ecological consulting firms are there based in the United Kingdom?

RevenueBase identified 927 ecological consulting 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?

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

Which city has the most ecological consulting firms?

London leads with 95 headquartered companies, followed by Bristol (20) and Manchester (19).

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 6,661 verified decision-maker contacts tracked across these 927 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 1, 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.