Company lists · Data refreshed September 2026

Top 25 Energy consulting firms based in London, United Kingdom

Name: Energy consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 294 companies tracked

RevenueBase identified 294 energy consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 8,326 professional contacts across them, including 3,321 with verified work emails and 607 with mobile numbers. London is the largest hub.

This list covers energy consulting firms headquartered in London, 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 12, 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 12, 2026 86% judged on-target in blind review

294Companies

8,326Contacts tracked

3,321Verified emails

607Mobile numbers

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The 25 largest energy consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 294 energy consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to energy 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	Shell Energy	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	2,627 contacts →
	Partial evidence “We help businesses manage energy needs, boost efficiency, control costs and achieve decarbonisation goals for a better energy future.” Source: RevenueBase Database · checked Sep 12, 2026
2	Dalkia UK	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	5,001-10,000	1,064 contacts →
	Partial evidence “Together, we’re delivering technical solutions for a better society and an Electric Britain Dalkia is one of the UK’s leading technical and energy services providers at the…” Source: RevenueBase Database · checked Sep 12, 2026
3	Penspen	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	1,007 contacts →
	Partial evidence “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Source: RevenueBase Database · checked Sep 12, 2026
4	Genesis	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	401 contacts →
	Partial evidence “Genesis is a market-leading advisory company focused on providing high-value technical and advisory services for the energy industry.” Source: RevenueBase Database · checked Sep 12, 2026
5	Atelier TEN	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	323 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 12, 2026
6	OWC	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	185 contacts →
	Partial evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 12, 2026
7	Wood Thilsted	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	175 contacts →
	Partial evidence “Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Source: RevenueBase Database · checked Sep 12, 2026
8	CFP Energy	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	171 contacts →
	Partial evidence “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Source: RevenueBase Database · checked Sep 12, 2026
9	Mitie Energy	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	125 contacts →
	Partial evidence “Mitie Energy are an award-winning, UK-based energy, utilities and sustainability solutions business.” Source: RevenueBase Database · checked Sep 12, 2026
10	ZTP	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	115 contacts →
	Indirect evidence “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Source: RevenueBase Database · checked Sep 12, 2026
11	Longevity Partners	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	115 contacts →
	Partial evidence “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Source: RevenueBase Database · checked Sep 12, 2026
12	Sustainable Advantage	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	89 contacts →
	Indirect evidence “Sustainable Advantage partners with Private Equity funds and businesses across the UK, France, and wider Europe.” Source: RevenueBase Database · checked Sep 12, 2026
13	Alfa Energy An Edison Energy Company	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	88 contacts →
	Partial evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 12, 2026
14	Advantage Utilities LTD	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	50 contacts →
	Partial evidence “Advantage Utilities mission is to provide customers with a “One-Stop-Shop” for all their energy needs – with Market Leading Data/Expertise and Unrivalled “Drop Everything”…” Source: RevenueBase Database · checked Sep 12, 2026
15	Engage Consulting	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	48 contacts →
	Partial evidence “Energy Industry Experts We are subject matter experts in the energy sector.” Source: RevenueBase Database · checked Sep 12, 2026
16	AVA Energy	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	47 contacts →
	Partial evidence “AVA Energy – Powering Energy Talent.” Source: RevenueBase Database · checked Sep 12, 2026
17	GAS Strategies	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	45 contacts →
	Indirect evidence “In a world where speed is a competitive advantage, Gas Strategies accelerates your route to readiness.” Source: RevenueBase Database · checked Sep 12, 2026
18	Amberside Advisors	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	44 contacts →
	Partial evidence “Amberside Advisors is an independent consultancy providing financial and commercial advice to low carbon energy, infrastructure and public sector projects.” Source: RevenueBase Database · checked Sep 12, 2026
19	Syzygy	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	35 contacts →
	Indirect evidence “Founded in 2010, Syzygy is the leading specialist low carbon technology consultancy for the real estate sector.” Source: RevenueBase Database · checked Sep 12, 2026
20	Energex	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	27 contacts →
	Partial evidence “Energex is a specialist commercial advisory practice serving the energy sector.” Source: RevenueBase Database · checked Sep 12, 2026
21	Etasca	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	27 contacts →
	Partial evidence “The energy transition is gaining momentum but needs to accelerate to meet the challenges posed by the climate emergency.” Source: RevenueBase Database · checked Sep 12, 2026
22	Timera Energy	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	26 contacts →
	Strong evidence “Timera Energy provides senior consulting expertise on value and risk in European gas and power markets.” Source: RevenueBase Database · checked Sep 12, 2026
23	Evolution Infrastructure	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	25 contacts →
	Indirect evidence “We are a specialist financial consultancy consisting of over 20 professional staff based in London, UK.” Source: RevenueBase Database · checked Sep 12, 2026
24	M.P.E. Power System Consultants	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	25 contacts →
	Indirect evidence “M.P.E.” Source: RevenueBase Database · checked Sep 12, 2026
25	Nationwide Utilities	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	25 contacts →
	Partial evidence “We believe that companies should be empowered to make the right energy procurement decisions to eliminate the risk of uncertainty.” Source: RevenueBase Database · checked Sep 12, 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: energy 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 energy consulting firms.
Partial evidence: Its own public description names part of energy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy 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 294 energy consulting firms based in London, United Kingdom

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Energy consulting firms based in London, United Kingdom at a glance

As of Sep 12, 2026

39.9%Verified-email coverage

7.3%Mobile-number coverage

28.3Average contacts per company

1-10Median size (employees)

92.9%Largest-city concentration · London

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

186

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

2,8170–30

47231–60

1561–90

090–180

17180+

Company record updated

Median 75.0d

00–30

3,01531–60

3,79361–90

1,05290–180

466180+

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 energy 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 London, United Kingdom whose own description of what they do matches “energy 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 energy 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 energy consulting firms, and records with no verified work email. Companies headquartered outside London 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, 3,321 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 12, 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.

Energy consulting firms by metro in the United Kingdom

Energy consulting firms in London273
Energy consulting firms in Manchester38
Energy consulting firms in Glasgow25

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 energy 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 energy consulting firms are there based in London, United Kingdom?

RevenueBase identified 294 energy consulting firms headquartered in London, 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?

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

Which city has the most energy consulting firms?

London leads with 273 headquartered companies, followed by Manchester (38) and Glasgow (25).

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 3,321 verified decision-maker contacts tracked across these 294 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 12, 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.