Company lists · Data refreshed September 2026

Top 22 Fuel efficiency consulting firms based in the United Kingdom

RevenueBase identified 64 fuel efficiency consulting firms headquartered in the United Kingdom as of September 2026 and tracks 509 professional contacts across them, including 258 with verified work emails. London is the largest hub.

This list covers fuel efficiency 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 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
64Companies
509Contacts tracked
258Verified emails
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The 22 largest fuel efficiency consulting firms based in the United Kingdom

Ranked by team size
Top 22 of 64 fuel efficiency consulting 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 fuel efficiency 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceAberdeen, United KingdomHQ checked Sep 28, 202651-20090 contacts →

Partial evidence

“Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceTeam Valley, United KingdomHQ checked Sep 28, 202611-5066 contacts →

Indirect evidence

“We bring good energy to the table to help you save yours.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceSandhurst, United KingdomHQ checked Sep 28, 202611-5049 contacts →

Indirect evidence

“Carbonxgen is a leading consultancy that specialises in solving complex energy and sustainability challenges.”

Source: RevenueBase Database · checked Sep 28, 2026
4Partial evidenceBristol, United KingdomHQ checked Sep 28, 202611-5020 contacts →

Partial evidence

“Energy and Technical Services is an expert in energy consulting and service and has been for 25th years.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceHampton Hill, United KingdomHQ checked Sep 28, 202611-5020 contacts →

Indirect evidence

“Carbon Architecture has spent the last twelve years helping energy intensive organisations optimise their processes.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceRugby, United KingdomHQ checked Sep 28, 202611-5017 contacts →

Indirect evidence

“Pro Enviro is a specialist energy engineering and process optimisation consultancy, with over 30 years’ experience working with manufacturing and other business clients.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceBourne, United KingdomHQ checked Sep 28, 202611-5016 contacts →

Indirect evidence

“TAKE AERODYNAMIC ACTION.”

Source: RevenueBase Database · checked Sep 28, 2026
8Partial evidenceWestbury, United KingdomHQ checked Sep 28, 20261-109 contacts →

Partial evidence

“BSSEC are commercial energy efficiency consultants.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceUnited KingdomHQ checked Sep 28, 202611-508 contacts →

Indirect evidence

“At HESS, we help hospitality businesses transform their energy consumption and sustainability practices, achieving measurable results without disrupting operations.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceLong Eaton, United KingdomHQ checked Sep 28, 20261-108 contacts →

Indirect evidence

“At BEM Services, our team of Energy Consultants work closely with our Mechanical and Electrical Design Engineers, to be able to advise our clients on how to minimise energy usage…”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceBury, United KingdomHQ checked Sep 28, 202611-507 contacts →

Indirect evidence

“CSR Sustain provide a comprehensive suite of energy auditing services to optimise asset and operational performance in properties – increasing their asset value, helping…”

Source: RevenueBase Database · checked Sep 28, 2026
12Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20261-103 contacts →

Indirect evidence

“Cerulogy is the consultancy of Dr.”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceOxford, United KingdomHQ checked Sep 28, 20261-103 contacts →

Indirect evidence

“CLS Energy (Consultancy) Ltd is a Chartered Energy and Chartered and Specialist Fleet Management company based in Oxford, UK.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceChester, United KingdomHQ checked Sep 28, 20261-103 contacts →

Indirect evidence

“A world where businesses thrive, not at the expense of our planet, but in harmony with it.”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceLeeds, United KingdomHQ checked Sep 28, 20261-103 contacts →

Partial evidence

“Maple Project Solutions is an innovative energy consultancy, providing solutions to help businesses use energy more efficiently.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceFarnham, United KingdomHQ checked Sep 28, 20261-102 contacts →

Indirect evidence

“Eco-Nomics helps your business reduce both operating costs and energy consumption.”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceLondon, United KingdomHQ checked Sep 28, 20261-102 contacts →

Partial evidence

“IO-Gen offers a smart and complete energy efficiency solution to your business operations, by leveraging the power of technology and information, our core services are entirely…”

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidenceBlackpool, United KingdomHQ checked Sep 28, 20261-102 contacts →

Partial evidence

“Soaring energy prices and concern about climate change from rising CO2 emissions has propelled the increased need for energy efficiency to the top of the agenda in the boardroom…”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20261-102 contacts →

Indirect evidence

“Carbon Sure Mission Statement • To support businesses reducing their carbon footprint.”

Source: RevenueBase Database · checked Sep 28, 2026
20Partial evidenceLondon, United KingdomHQ checked Sep 28, 20261-101 contacts →

Partial evidence

“MCL is a specialist consultancy providing sustainability & energy efficiency solutions that deliver results.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceNeston, United KingdomHQ checked Sep 28, 20261-101 contacts →

Indirect evidence

“Zexu is a consultancy specialising in energy and sustainability.”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceWymondham, United KingdomHQ checked Sep 28, 20261-101 contacts →

Indirect evidence

“I am Jeremy Carter of Carter Energy Consultancy.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 22 of 64 fuel efficiency consulting firms based in the United Kingdom

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Fuel efficiency consulting firms based in the United Kingdom at a glance

As of Sep 28, 2026
50.7%Verified-email coverage
8.0Average contacts per company
1-10Median size (employees)
15.6%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
46
11-50
15
51-200
3

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 64 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 fuel efficiency 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 “fuel efficiency 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 fuel efficiency 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 fuel efficiency 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, 258 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.

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 fuel efficiency 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 fuel efficiency consulting firms are there based in the United Kingdom?

RevenueBase identified 64 fuel efficiency 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?

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

Which city has the most fuel efficiency consulting firms?

London leads with 10 headquartered companies, followed by Leeds (4) and Bristol (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 258 verified decision-maker contacts tracked across these 64 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.