Company lists · Data refreshed September 2026

Top 25 Grid resilience consulting firms based in the United Kingdom

RevenueBase identified 170 grid resilience consulting firms headquartered in the United Kingdom as of September 2026 and tracks 6,260 professional contacts across them, including 1,670 with verified work emails. London is the largest hub.

This list covers grid resilience 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
170Companies
6,260Contacts tracked
1,670Verified emails
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The 25 largest grid resilience consulting firms based in the United Kingdom

Ranked by team size
Top 25 of 170 grid resilience 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 grid resilience 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
1Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20261,001-5,0001,007 contacts →

Indirect evidence

“Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20265,001-10,000728 contacts →

Indirect evidence

“We support the government, utilities and private sectors through the delivery of market leading integrated technology-enabled solutions from design and implementation to…”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceWesthill, United KingdomHQ checked Sep 28, 202651-200415 contacts →

Indirect evidence

“Vysus Group is an engineering and technical consultancy, offering specialist asset performance, risk management and project management expertise across complex industrial assets…”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceManchester, United KingdomHQ checked Sep 28, 202651-200150 contacts →

Indirect evidence

“TNEI is an independent specialist energy consultancy providing technical, strategic, environmental and consenting advice to organisations operating within the conventional and…”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceLondon, United KingdomHQ checked Sep 28, 2026201-500137 contacts →

Indirect evidence

“We help our clients to invest in and navigate the energy transition.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceLisburn, United KingdomHQ checked Sep 28, 2026501-1,000108 contacts →

Indirect evidence

“Empowering Your Tomorrow.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceBristol, United KingdomHQ checked Sep 28, 202651-200100 contacts →

Indirect evidence

“Everoze is an employee-owned renewables, green hydrogen and storage consultancy.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceBasingstoke, United KingdomHQ checked Sep 28, 202651-20076 contacts →

Indirect evidence

“We exist to enable informed and robust decision-making by owners and operators of critical national infrastructure.”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceLondon, United KingdomHQ checked Sep 28, 202651-20066 contacts →

Partial evidence

“Reactive Technologies (RTL) is a global Grid-Enhancing Technologies (GETs) company addressing the challenges of energy transition, electrification and accelerating load growth.”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceLeicester, United KingdomHQ checked Sep 28, 202651-20057 contacts →

Indirect evidence

“Kelvin Power provides expert advice and design solutions to the global power industry and the renewable energy sector.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect 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
12Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-5048 contacts →

Indirect evidence

“Energy Industry Experts We are subject matter experts in the energy sector.”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-5047 contacts →

Indirect evidence

“AVA Energy – Powering Energy Talent.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceBristol, United KingdomHQ checked Sep 28, 202611-5032 contacts →

Indirect evidence

“Our Footprints combines a small and dedicated group of highly experienced and qualified Engineers/ Project Managers.”

Source: RevenueBase Database · checked Sep 28, 2026
15Partial evidenceLichfield, United KingdomHQ checked Sep 28, 202611-5031 contacts →

Partial evidence

“RAB are dedicated to increasing resilience and reducing flood risk.”

Source: RevenueBase Database · checked Sep 28, 2026
16Partial evidenceLondon, United KingdomHQ checked Sep 28, 202611-5026 contacts →

Partial evidence

“Timera Energy provides senior consulting expertise on value and risk in European gas and power markets.”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceGlasgow, United KingdomHQ checked Sep 28, 202611-5025 contacts →

Partial evidence

“Cairn Risk Consulting was established to meet the growing demand for pragmatic and proportionate risk management support to enable the transition to net carbon zero in a safe…”

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidenceLondon, United KingdomHQ checked Sep 28, 202611-5025 contacts →

Partial evidence

“Sirio is a specialist consulting firm operating at the intersection of consumers, regulation and utilities.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-5025 contacts →

Indirect evidence

“M.P.E.”

Source: RevenueBase Database · checked Sep 28, 2026
20Partial evidenceBristol, United KingdomHQ checked Sep 28, 202611-5021 contacts →

Partial evidence

“PSE 2 Consulting is an independent power systems consultancy firm offering tailored solutions to meet the challenges and economic pressures present in the power industry.”

Source: RevenueBase Database · checked Sep 28, 2026
21Partial evidenceHaywards Heath, United KingdomHQ checked Sep 28, 202651-20019 contacts →

Partial evidence

“Utilligence is a leading consultancy in net zero solutions, supporting companies and grid operators in their journey to decarbonise the power we depend on.”

Source: RevenueBase Database · checked Sep 28, 2026
22Partial evidenceBurford, United KingdomHQ checked Sep 28, 20261-1019 contacts →

Partial evidence

“Complex electricity grid connection challenges can derail critical infrastructure projects worth hundreds of millions.”

Source: RevenueBase Database · checked Sep 28, 2026
23Indirect evidenceBillingshurst, United KingdomHQ checked Sep 28, 202611-5019 contacts →

Indirect evidence

“We are experts in utility networks with products that support planning and site assessment as well as enabling safe working and procurement of utility work.”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceNottingham, United KingdomHQ checked Sep 28, 202611-5014 contacts →

Indirect evidence

“Mercia Power is a utilities company based in Nottingham, United Kingdom.”

Source: RevenueBase Database · checked Sep 28, 2026
25Indirect evidenceManchester, United KingdomHQ checked Sep 28, 202611-5014 contacts →

Indirect evidence

“RMRI’s experience in the evaluation and assessment of risk in energy sector operations and transition helps clients to understand and navigate the complex decisions that must be…”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 170 grid resilience consulting firms based in the United Kingdom

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Grid resilience consulting firms based in the United Kingdom at a glance

As of Sep 28, 2026
26.7%Verified-email coverage
36.8Average contacts per company
1-10Median size (employees)
31.2%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
108
11-50
39
51-200
13
201-500
4
501-1,000
3
1,001-5,000
1
5,001-10,000
1
10001+
1

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 170 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 grid resilience 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 “grid resilience 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 grid resilience 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 grid resilience 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, 1,670 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.

Grid resilience consulting firms by metro

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 grid resilience 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 grid resilience consulting firms are there based in the United Kingdom?

RevenueBase identified 170 grid resilience 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?

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

Which city has the most grid resilience consulting firms?

London leads with 53 headquartered companies, followed by Edinburgh (6) and Manchester (6).

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 1,670 verified decision-maker contacts tracked across these 170 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.