Company lists · Data refreshed September 2026

Top 25 Grid reliability consulting firms based in the United Kingdom

Name: Grid reliability 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 3, 2026 171 companies tracked

RevenueBase identified 171 grid reliability consulting firms headquartered in the United Kingdom as of September 2026 and tracks 2,332 professional contacts across them, including 666 with verified work emails and 113 with mobile numbers. London is the largest hub.

This list covers grid reliability 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 3, 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 3, 2026 86% judged on-target in blind review

171Companies

2,332Contacts tracked

666Verified emails

113Mobile numbers

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The 25 largest grid reliability consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 171 grid reliability consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to grid reliability 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	Brush Group	Partial evidence	Loughborough, United KingdomHQ checked Sep 3, 2026	501-1,000	364 contacts →
	Partial evidence “We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…” Source: RevenueBase Database · checked Sep 3, 2026
2	TNEI	Indirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	51-200	148 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 3, 2026
3	Powersystems	Indirect evidence	Bristol, United KingdomHQ checked Sep 3, 2026	51-200	126 contacts →
	Indirect evidence “Powered by People.” Source: RevenueBase Database · checked Sep 3, 2026
4	Camlin Energy	Indirect evidence	Lisburn, United KingdomHQ checked Sep 3, 2026	501-1,000	105 contacts →
	Indirect evidence “Empowering Your Tomorrow.” Source: RevenueBase Database · checked Sep 3, 2026
5	IPEC	Indirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	64 contacts →
	Indirect evidence “IPEC Limited was founded in 1995 with the objective of transferring cutting-edge technology to the power industry by generating a dialogue between academic research, industry, and…” Source: RevenueBase Database · checked Sep 3, 2026
6	Kelvin Power Member Of Vinci Energies	Indirect evidence	Leicester, United KingdomHQ checked Sep 3, 2026	51-200	59 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 3, 2026
7	Energyline LTD	Indirect evidence	Copgrove, United KingdomHQ checked Sep 3, 2026	51-200	39 contacts →
	Indirect evidence “Energyline Ltd is a growing multi-disciplinary consultancy specialising in the design, survey, investigation and consenting of power system projects including overhead lines and…” Source: RevenueBase Database · checked Sep 3, 2026
8	EDS HV Group	Indirect evidence	Haslingden, United KingdomHQ checked Sep 3, 2026	51-200	38 contacts →
	Indirect evidence “High Voltage Engineering Solutions, from conceptual design, through to installation and O&M.” Source: RevenueBase Database · checked Sep 3, 2026
9	Integrity	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 3, 2026	11-50	31 contacts →
	Indirect evidence “We enable safe, reliable operations and reduced outages for energy assets across the globe through our people, our expertise, and our commitment to deliver Integrated Service…” Source: RevenueBase Database · checked Sep 3, 2026
10	3eco LTD	Indirect evidence	Witney, United KingdomHQ checked Sep 3, 2026	11-50	28 contacts →
	Indirect evidence “3ECO Ltd is a consultancy firm that operates in the electrical and railway sectors.” Source: RevenueBase Database · checked Sep 3, 2026
11	Navitas Engineering LTD	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	26 contacts →
	Indirect evidence “Navitas Engineering provides electrical engineering consultancy services to the railway and electricity supply industries.” Source: RevenueBase Database · checked Sep 3, 2026
12	Timera Energy	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	25 contacts →
	Partial evidence “Timera Energy provides senior consulting expertise on value and risk in European gas and power markets.” Source: RevenueBase Database · checked Sep 3, 2026
13	M.P.E. Power System Consultants	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	25 contacts →
	Indirect evidence “M.P.E.” Source: RevenueBase Database · checked Sep 3, 2026
14	Ailsa Reliability Solutions LTD	Partial evidence	Kilwinning, United KingdomHQ checked Sep 3, 2026	11-50	24 contacts →
	Partial evidence “Reliability Solutions business focusing on maximising uptime performance and availability of key and critical plant and assets Evaluation and assessment for both reliability and…” Source: RevenueBase Database · checked Sep 3, 2026
15	PSE 2 Consulting	Partial evidence	Bristol, United KingdomHQ checked Sep 3, 2026	11-50	21 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 3, 2026
16	Walker & Watts Limited	Indirect evidence	Burgess Hill, United KingdomHQ checked Sep 3, 2026	11-50	20 contacts →
	Indirect evidence “Walker & Watts Ltd is an SME specialising in Power Systems Consultancy & Design services, from LV to 132kV, within the Utility Sector.” Source: RevenueBase Database · checked Sep 3, 2026
17	HK Engineering LTD	Indirect evidence	Melksham, United KingdomHQ checked Sep 3, 2026	11-50	20 contacts →
	Indirect evidence “HK Engineering Ltd is a leading engineering company specialising in electrical and gas testing and innovative solutions, with a solid commitment to excellence.” Source: RevenueBase Database · checked Sep 3, 2026
18	Scotts Electrical Services Limited	Indirect evidence	Belfast, United KingdomHQ checked Sep 3, 2026	11-50	19 contacts →
	Indirect evidence “Scott’s Electrical Services Ltd is a leading Electrical Engineering Company based in Belfast.” Source: RevenueBase Database · checked Sep 3, 2026
19	Primary Power Consulting	Partial evidence	Cheadle, United KingdomHQ checked Sep 3, 2026	11-50	17 contacts →
	Partial evidence “Primary Power Consulting is a UK‑based power engineering and project management consultancy specialising in the delivery of complex HV and EHV electricity infrastructure.” Source: RevenueBase Database · checked Sep 3, 2026
20	PSS Power Engineering LTD	Indirect evidence	Winchester, United KingdomHQ checked Sep 3, 2026	11-50	15 contacts →
	Indirect evidence “PSS POWER ENGINEERING LTD is a high-voltage electrical engineering company based in South East England, United Kingdom.” Source: RevenueBase Database · checked Sep 3, 2026
21	Threepwood Consulting LTD	Partial evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	14 contacts →
	Partial evidence “Threepwood Consulting Ltd is an established Power Engineering Consultancy providing specialist engineering services and consultancy to its partners and clients.” Source: RevenueBase Database · checked Sep 3, 2026
22	RMRI	Indirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	13 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 3, 2026
23	Power Transmission & Distribution	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	13 contacts →
	Indirect evidence “PaE T&D is a Power Transmission and Distribution Design Consultancy” Source: RevenueBase Database · checked Sep 3, 2026
24	British Power International	Indirect evidence	Colchester, United KingdomHQ checked Sep 3, 2026	51-200	13 contacts →
	Indirect evidence “BPI is a long established and experienced energy sector consultancy business, offering a range of services in the planning, design, construction, operation and regulation of power…” Source: RevenueBase Database · checked Sep 3, 2026
25	HV Energy Solutions LTD	Indirect evidence	Headquarters, United KingdomHQ checked Sep 3, 2026	11-50	12 contacts →
	Indirect evidence “Our distinct expertise lies in designing, engineering, maintaining, installing, testing and commissioning high-voltage substations, electrical transmission and distribution…” Source: RevenueBase Database · checked Sep 3, 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: grid reliability 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 grid reliability consulting firms.
Partial evidence: Its own public description names part of grid reliability consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name grid reliability 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 171 grid reliability consulting firms based in the United Kingdom

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

As of Sep 3, 2026

28.6%Verified-email coverage

4.8%Mobile-number coverage

13.6Average contacts per company

1-10Median size (employees)

15.2%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

106

11-50

51-200

501-1,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

4231–60

37861–90

24590–180

1180+

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 reliability 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 reliability 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 reliability 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 reliability 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, 666 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 3, 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 reliability consulting firms by metro

Grid reliability consulting firms in London26

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

RevenueBase identified 171 grid reliability 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?

Brush Group, headquartered in Loughborough, tops this list with the largest team on record.

Which city has the most grid reliability consulting firms?

London leads with 26 headquartered companies, followed by Manchester (11) and Bristol (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 666 verified decision-maker contacts tracked across these 171 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 3, 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.