Company lists · Data refreshed September 2026

Top 25 Substation maintenance solutions based in the United Kingdom

Name: Substation maintenance solutions based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 102 companies tracked

RevenueBase identified 102 substation maintenance solutions headquartered in the United Kingdom as of September 2026 and tracks 2,296 professional contacts across them, including 230 with verified work emails. Manchester is the largest hub.

This list covers substation maintenance solutions 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 22, 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 22, 2026 86% judged on-target in blind review

102Companies

2,296Contacts tracked

230Verified emails

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The 25 largest substation maintenance solutions based in the United Kingdom

Ranked by team size

Top 25 of 102 substation maintenance solutions based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to substation maintenance solutions: 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	Hvss High Voltage Substation Services LTD	Partial evidence	Watford, United KingdomHQ checked Sep 22, 2026	11-50	55 contacts →
	Partial evidence “HVSS (High Voltage Substation Services) was formed in 2009 specializing in installation and commissioning of High Voltage Substations Systems up to 400kV.” Source: RevenueBase Database · checked Sep 22, 2026
2	The Wiggett Group LTD	Indirect evidence	Brentwood, United KingdomHQ checked Sep 22, 2026	201-500	51 contacts →
	Indirect evidence “Wiggett Electrical has gone from strength to strength.” Source: RevenueBase Database · checked Sep 22, 2026
3	Substation Engineering Services LTD	Strong evidence	Stafford, United KingdomHQ checked Sep 22, 2026	11-50	36 contacts →
	Strong evidence “Specialising in High Voltage Substation Installation & Commissioning, Site & Project Management, Refurbishment, Maintenance, SES Ltd has established a solid reputation for…” Source: RevenueBase Database · checked Sep 22, 2026
4	Industrial Switchgear Services LTD	Indirect evidence	Hyde, United KingdomHQ checked Sep 22, 2026	51-200	30 contacts →
	Indirect evidence “ISS Ltd are a HV/LV Power Engineering company operating nationwide, undertaking Turnkey Electrical Distribution Projects and Site Service activities, including installation…” Source: RevenueBase Database · checked Sep 22, 2026
5	HK Engineering LTD	Partial evidence	Melksham, United KingdomHQ checked Sep 22, 2026	11-50	20 contacts →
	Partial 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 22, 2026
6	Site Energy Services Limited	Indirect evidence	Newcastle Under Lyme, United KingdomHQ checked Sep 22, 2026	11-50	20 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
7	Valen Power Engineering LTD	Partial evidence	Manchester, United KingdomHQ checked Sep 22, 2026	11-50	19 contacts →
	Partial evidence “Valen Power Engineering Ltd provides electrical engineering solutions for systems ranging from LV to 400kV.” Source: RevenueBase Database · checked Sep 22, 2026
8	L.C. Switchgear Limited	Indirect evidence	Hove, United KingdomHQ checked Sep 22, 2026	51-200	17 contacts →
	Indirect evidence “L.” Source: RevenueBase Database · checked Sep 22, 2026
9	Winshall LTD	Partial evidence	Llantrisant, United KingdomHQ checked Sep 22, 2026	11-50	17 contacts →
	Partial evidence “Substation Project Support: Project & Site Management, Civils & M&E Installation Teams.” Source: RevenueBase Database · checked Sep 22, 2026
10	Power Engineering Services	Partial evidence	Wortley, United KingdomHQ checked Sep 22, 2026	11-50	16 contacts →
	Partial evidence “Unique in its operations, PES engineers substation equipment at its Leeds-based production facility, providing turnkey private network installation, independent contestable…” Source: RevenueBase Database · checked Sep 22, 2026
11	Redas Engineering & Construction	Partial evidence	Staffordshire, United KingdomHQ checked Sep 22, 2026	11-50	16 contacts →
	Partial evidence “REDAS Engineering & Construction is a team of experienced professionals with more than a decade experience in substation tendering, procurement, design, Installation, and…” Source: RevenueBase Database · checked Sep 22, 2026
12	HV Energy Solutions LTD	Partial evidence	Norwich, United KingdomHQ checked Sep 22, 2026	11-50	13 contacts →
	Partial 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 22, 2026
13	IES Instrumentation Electrical Services LTD	Indirect evidence	Stockton On Tees, United KingdomHQ checked Sep 22, 2026	51-200	13 contacts →
	Indirect evidence “From initial design to final commissioning and testing IES offer the complete electrical distribution package.” Source: RevenueBase Database · checked Sep 22, 2026
14	MS Electrical Solutions	Partial evidence	Bilton, United KingdomHQ checked Sep 22, 2026	1-10	13 contacts →
	Partial evidence “Choose MS Electrical Solutions LTD for all your electrical install needs and benefit from a dependable service, expert support and quality workmanship, with projects delivered on…” Source: RevenueBase Database · checked Sep 22, 2026
15	MET Group Technical	Indirect evidence	Manchester, United KingdomHQ checked Sep 22, 2026	51-200	11 contacts →
	Indirect evidence “MET Group Technical provide a unique electrical energised inspection service to high & low voltage assets including your Power Distribution, Busbars, Submains & Fixed Wiring.” Source: RevenueBase Database · checked Sep 22, 2026
16	Johnson & Phillips	Strong evidence	Newport, United KingdomHQ checked Sep 22, 2026	11-50	11 contacts →
	Strong evidence “Power Distribution System & Solutions Engineers to 66kV Switchboards LV & MV - Power Factor Correction - Transformers Installation, Maintenance, Supply, Repair, Service and…” Source: RevenueBase Database · checked Sep 22, 2026
17	Cable Connections LTD	Indirect evidence	Portsmouth, United KingdomHQ checked Sep 22, 2026	1-10	11 contacts →
	Indirect evidence “Cable Connections Ltd was established in 2016 with the vision of becoming the UK’s number one electrical contractor.” Source: RevenueBase Database · checked Sep 22, 2026
18	MEC Electrical Contractors LTD	Partial evidence	Sheffield, United KingdomHQ checked Sep 22, 2026	51-200	11 contacts →
	Partial evidence “The Group are internationally recognised experts in HV and LV power and distribution equipment, HV and LV installation and maintenance.” Source: RevenueBase Database · checked Sep 22, 2026
19	Independent Substation Services	Indirect evidence	Aylesbury, United KingdomHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “If you need assistance with any High Voltage (HV) and Low Voltage (LV) equipment, then look no further.” Source: RevenueBase Database · checked Sep 22, 2026
20	EME Power Systems Limited	Indirect evidence	Sleaford, United KingdomHQ checked Sep 22, 2026	11-50	9 contacts →
	Indirect evidence “EME Power Systems Limited is a leading national provider of power distribution services to business and industry.” Source: RevenueBase Database · checked Sep 22, 2026
21	S2 Electrical LTD	Partial evidence	Colchester, United KingdomHQ checked Sep 22, 2026	1-10	9 contacts →
	Partial evidence “S2 ELECTRICAL LTD is Electrical contractors and maintenance specialist in Gt Tey Colchester Essex CO61JG” Source: RevenueBase Database · checked Sep 22, 2026
22	Sovereign Electrical Services Limited	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 22, 2026	11-50	8 contacts →
	Indirect evidence “SOVEREIGN ELECTRICAL SERVICES LIMITED is a Electrical Contractors Company” Source: RevenueBase Database · checked Sep 22, 2026
23	Clayton Electrical Limited	Indirect evidence	Surrey, United KingdomHQ checked Sep 22, 2026	1-10	7 contacts →
	Indirect evidence “CLAYTON ELECTRICAL LIMITED is a Electrical Contractor.” Source: RevenueBase Database · checked Sep 22, 2026
24	Edsp Solutions	Partial evidence	Nationwide, United KingdomHQ checked Sep 22, 2026	11-50	6 contacts →
	Partial evidence “Here at edsp solutions we can design, project manage and deliver all schemes from low voltage through to 132kv with the capabilities to also project manage schemes at 275kv &…” Source: RevenueBase Database · checked Sep 22, 2026
25	Coleman Electrical Services Limited	Indirect evidence	Studley, United KingdomHQ checked Sep 22, 2026	11-50	6 contacts →
	Indirect evidence “COLEMAN ELECTRICAL SERVICES LIMITED is an established Electrical Contractor company located on 34 High Street, Studley, Warwickshire, B80 7HJ.” Source: RevenueBase Database · checked Sep 22, 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: substation maintenance solutions. 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 substation maintenance solutions.
Partial evidence: Its own public description names part of substation maintenance solutions, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name substation maintenance solutions. 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 102 substation maintenance solutions based in the United Kingdom

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Substation maintenance solutions based in the United Kingdom at a glance

As of Sep 22, 2026

10.0%Verified-email coverage

22.5Average contacts per company

1-10Median size (employees)

6.9%Largest-city concentration · Manchester

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 102 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 substation maintenance solutions, 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 “substation maintenance solutions”. 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 substation maintenance solutions), 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 substation maintenance solutions, 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, 230 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 22, 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 substation maintenance solutions, 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 substation maintenance solutions are there based in the United Kingdom?

RevenueBase identified 102 substation maintenance solutions 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?

Hvss High Voltage Substation Services LTD, headquartered in Watford, tops this list with the largest team on record.

Which city has the most substation maintenance solutions?

Manchester leads with 7 headquartered companies, followed by London (5) and Leeds (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 230 verified decision-maker contacts tracked across these 102 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 22, 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.