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, how directly it supports the match, 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 SmartSearch, 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 Match evidence 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. Evidence rates how directly each company's own description names grid reliability consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Brush GroupPartial evidence	Loughborough, United KingdomHQ checked Sep 3, 2026	501-1,000	364
	“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: company website · checked Sep 3, 2026
2	TNEIIndirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	51-200	148
	“TNEI is an independent specialist energy consultancy providing technical, strategic, environmental and consenting advice to organisations operating within the conventional and…” Source: company website · checked Sep 3, 2026
3	PowersystemsIndirect evidence	Bristol, United KingdomHQ checked Sep 3, 2026	51-200	126
	“Powered by People.” Source: company website · checked Sep 3, 2026
4	Camlin EnergyIndirect evidence	Lisburn, United KingdomHQ checked Sep 3, 2026	501-1,000	105
	“Empowering Your Tomorrow.” Source: company website · checked Sep 3, 2026
5	IPECIndirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	64
	“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: company website · checked Sep 3, 2026
6	Kelvin Power Member Of Vinci EnergiesIndirect evidence	Leicester, United KingdomHQ checked Sep 3, 2026	51-200	59
	“Kelvin Power provides expert advice and design solutions to the global power industry and the renewable energy sector.” Source: company website · checked Sep 3, 2026
7	Energyline LTDIndirect evidence	Copgrove, United KingdomHQ checked Sep 3, 2026	51-200	39
	“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: company website · checked Sep 3, 2026
8	EDS HV GroupIndirect evidence	Haslingden, United KingdomHQ checked Sep 3, 2026	51-200	38
	“High Voltage Engineering Solutions, from conceptual design, through to installation and O&M.” Source: company website · checked Sep 3, 2026
9	IntegrityIndirect evidence	Aberdeen, United KingdomHQ checked Sep 3, 2026	11-50	31
	“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: company website · checked Sep 3, 2026
10	3eco LTDIndirect evidence	Witney, United KingdomHQ checked Sep 3, 2026	11-50	28
	“3ECO Ltd is a consultancy firm that operates in the electrical and railway sectors.” Source: company website · checked Sep 3, 2026
11	Navitas Engineering LTDIndirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	26
	“Navitas Engineering provides electrical engineering consultancy services to the railway and electricity supply industries.” Source: company website · checked Sep 3, 2026
12	Timera EnergyPartial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	25
	“Timera Energy provides senior consulting expertise on value and risk in European gas and power markets.” Source: company website · checked Sep 3, 2026
13	M.P.E. Power System ConsultantsIndirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	25
	“M.P.E.” Source: company website · checked Sep 3, 2026
14	Ailsa Reliability Solutions LTDPartial evidence	Kilwinning, United KingdomHQ checked Sep 3, 2026	11-50	24
	“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: company website · checked Sep 3, 2026
15	PSE 2 ConsultingPartial evidence	Bristol, United KingdomHQ checked Sep 3, 2026	11-50	21
	“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: company website · checked Sep 3, 2026
16	Walker & Watts LimitedIndirect evidence	Burgess Hill, United KingdomHQ checked Sep 3, 2026	11-50	20
	“Walker & Watts Ltd is an SME specialising in Power Systems Consultancy & Design services, from LV to 132kV, within the Utility Sector.” Source: company website · checked Sep 3, 2026
17	HK Engineering LTDIndirect evidence	Melksham, United KingdomHQ checked Sep 3, 2026	11-50	20
	“HK Engineering Ltd is a leading engineering company specialising in electrical and gas testing and innovative solutions, with a solid commitment to excellence.” Source: company website · checked Sep 3, 2026
18	Scotts Electrical Services LimitedIndirect evidence	Belfast, United KingdomHQ checked Sep 3, 2026	11-50	19
	“Scott’s Electrical Services Ltd is a leading Electrical Engineering Company based in Belfast.” Source: company website · checked Sep 3, 2026
19	Primary Power ConsultingPartial evidence	Cheadle, United KingdomHQ checked Sep 3, 2026	11-50	17
	“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: company website · checked Sep 3, 2026
20	PSS Power Engineering LTDIndirect evidence	Winchester, United KingdomHQ checked Sep 3, 2026	11-50	15
	“PSS POWER ENGINEERING LTD is a high-voltage electrical engineering company based in South East England, United Kingdom.” Source: company website · checked Sep 3, 2026
21	Threepwood Consulting LTDPartial evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	14
	“Threepwood Consulting Ltd is an established Power Engineering Consultancy providing specialist engineering services and consultancy to its partners and clients.” Source: company website · checked Sep 3, 2026
22	RMRIIndirect evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	13
	“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: company website · checked Sep 3, 2026
23	Power Transmission & DistributionIndirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	13
	“PaE T&D is a Power Transmission and Distribution Design Consultancy” Source: company website · checked Sep 3, 2026
24	British Power InternationalIndirect evidence	Colchester, United KingdomHQ checked Sep 3, 2026	51-200	13
	“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: company website · checked Sep 3, 2026
25	HV Energy Solutions LTDIndirect evidence	Headquarters, United KingdomHQ checked Sep 3, 2026	11-50	12
	“Our distinct expertise lies in designing, engineering, maintaining, installing, testing and commissioning high-voltage substations, electrical transmission and distribution…” Source: company website · checked Sep 3, 2026

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

1-10Median size (employees)

LondonLargest hub · 26 HQs

113Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

106

11-50

51-200

501-1,000

Verified emails by last verification

0–30

31–60

61–90

378

90–180

245

180+

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 evidence 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 SmartSearch, 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.
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 an evidence 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

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 SmartSearch, 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.