Company lists · Data refreshed September 2026

Top 25 Rail electrification companies based in the United Kingdom

Name: Rail electrification companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 711 companies tracked

RevenueBase identified 711 rail electrification companies headquartered in the United Kingdom as of September 2026 and tracks 11,486 professional contacts across them, including 3,969 with verified work emails. London is the largest hub.

This list covers rail electrification companies 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 17, 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 17, 2026 86% judged on-target in blind review

711Companies

11,486Contacts tracked

3,969Verified emails

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The 25 largest rail electrification companies based in the United Kingdom

Ranked by team size

Top 25 of 711 rail electrification companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to rail electrification companies: 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	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 17, 2026
2	Colas Rail UK	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	868 contacts →
	Partial evidence “Colas Rail is one of Europe’s leading suppliers of railway infrastructure services, we are award-winning specialists having constructed all forms of railways across Europe and the…” Source: RevenueBase Database · checked Sep 17, 2026
3	Volkerrail LTD	Indirect evidence	Doncaster, United KingdomHQ checked Sep 17, 2026	1,001-5,000	767 contacts →
	Indirect evidence “Since entering the construction market in 1935, VolkerRail has become one of the UK’s leading multidisciplinary railway infrastructure contractors.” Source: RevenueBase Database · checked Sep 17, 2026
4	Freedom	Indirect evidence	Leeds, United KingdomHQ checked Sep 17, 2026	1,001-5,000	664 contacts →
	Indirect evidence “Freedom is a leading provider of facilities and power engineering services.” Source: RevenueBase Database · checked Sep 17, 2026
5	Aureos	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	583 contacts →
	Indirect evidence “Aureos is a multi-disciplinary energy, transport networks specialist and engineering services provider, spanning the design, engineering, installation, maintenance, and crisis…” Source: RevenueBase Database · checked Sep 17, 2026
6	QTS Group	Indirect evidence	Strathaven, United KingdomHQ checked Sep 17, 2026	501-1,000	486 contacts →
	Indirect evidence “QTS is one of the country’s leading railways contractors, founded by MD, Alan McLeish.” Source: RevenueBase Database · checked Sep 17, 2026
7	SPL Powerlines Uk&i	Partial evidence	Coatbridge, United KingdomHQ checked Sep 17, 2026	501-1,000	337 contacts →
	Partial evidence “SPL Powerlines UK & I is a leading multi-disciplinary infrastructure specialist, offering end-to-end delivery across both rail and energy sectors with capabilities that set us…” Source: RevenueBase Database · checked Sep 17, 2026
8	Pod-Trak	Indirect evidence	Uxbridge, United KingdomHQ checked Sep 17, 2026	201-500	221 contacts →
	Indirect evidence “Pod-Trak is a privately owned, multi-disciplinary infrastructure contractor operating across the UK, Ireland, and Europe since 2007.” Source: RevenueBase Database · checked Sep 17, 2026
9	IQA Elecnor	Indirect evidence	Glasgow, United KingdomHQ checked Sep 17, 2026	201-500	184 contacts →
	Indirect evidence “IQA lead the way in designing, building, maintaining, and upgrading electrical utility networks, telecommunication networks, EVCP and electrical infrastructure for both the public…” Source: RevenueBase Database · checked Sep 17, 2026
10	TES 2000 LTD	Partial evidence	Colchester, United KingdomHQ checked Sep 17, 2026	201-500	142 contacts →
	Partial evidence “TES Ltd is a long established, highly regarded contractor to the rail industry.” Source: RevenueBase Database · checked Sep 17, 2026
11	Trackwork Limited	Partial evidence	Doncaster, United KingdomHQ checked Sep 17, 2026	201-500	141 contacts →
	Partial evidence “Trackwork Ltd is a specialist rail infrastructure engineering company providing the following services & products: • Track renewals, remodelling, installation & maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
12	Darke & Taylor LTD	Indirect evidence	Oxfordshire, United KingdomHQ checked Sep 17, 2026	51-200	112 contacts →
	Indirect evidence “Our mission is to excel in the design, installation and maintenance of the electro-technical systems that connect to create fit for purpose building environments.” Source: RevenueBase Database · checked Sep 17, 2026
13	Rock Power Connections LTD	Indirect evidence	Bromsgrove, United KingdomHQ checked Sep 17, 2026	51-200	105 contacts →
	Indirect evidence “Rock Power Connections are experts in electrical connections with a proven track record of quality and safety.” Source: RevenueBase Database · checked Sep 17, 2026
14	GTDS	Indirect evidence	Hill, United KingdomHQ checked Sep 17, 2026	51-200	82 contacts →
	Indirect evidence “GTDS was established in July 2004 to provide specialist installation and commissioning services to the major manufacturers, National Grid and the Distribution Network Operators…” Source: RevenueBase Database · checked Sep 17, 2026
15	Global Substation Solutions LTD	Indirect evidence	Hebburn, United KingdomHQ checked Sep 17, 2026	51-200	75 contacts →
	Indirect evidence “Established in 2006, Global Substation Solutions Ltd (GSS) are a dynamic power system engineering company, providing turnkey project services to the UK and international…” Source: RevenueBase Database · checked Sep 17, 2026
16	AMARO	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	64 contacts →
	Partial evidence “A Network Rail Principal Contractor and partner of choice for some of the biggest names in rail, we deliver integrated signalling, power, and telecoms solutions throughout the UK…” Source: RevenueBase Database · checked Sep 17, 2026
17	Premier Electrics	Indirect evidence	Magherafelt, United KingdomHQ checked Sep 17, 2026	51-200	58 contacts →
	Indirect evidence “Premier Electrics have been delivering exciting projects throughout Ireland, UK and Europe since 1993.” Source: RevenueBase Database · checked Sep 17, 2026
18	Avidety	Indirect evidence	Sittingbourne, United KingdomHQ checked Sep 17, 2026	51-200	56 contacts →
	Indirect evidence “Avidety specialise in the construction and maintenance of overhead and underground electricity networks.” Source: RevenueBase Database · checked Sep 17, 2026
19	Hvss High Voltage Substation Services LTD	Indirect evidence	Watford, United KingdomHQ checked Sep 17, 2026	11-50	55 contacts →
	Indirect 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 17, 2026
20	RJ Power	Indirect evidence	Sidcup, United KingdomHQ checked Sep 17, 2026	51-200	53 contacts →
	Indirect evidence “RJ Power Group is a specialist electrical contracting business, providing engineering solutions in the power sector.” Source: RevenueBase Database · checked Sep 17, 2026
21	Lundy Projects LTD	Indirect evidence	Stockport, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Indirect evidence “Lundy Projects is an award-winning multi-disciplinary civil engineering company with an excellent reputation for delivering major signalling and OLE infrastructure projects…” Source: RevenueBase Database · checked Sep 17, 2026
22	Rail OP OHL Limited	Strong evidence	East Anglia, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Strong evidence “Rail Op OHL Ltd is a long established and highly regarded Electrification contractor to the Rail Industry.” Source: RevenueBase Database · checked Sep 17, 2026
23	Sonic Rail Services LTD	Indirect evidence	Burnham-on-crouch, United KingdomHQ checked Sep 17, 2026	51-200	49 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
24	Powercor LTD	Indirect evidence	Weybridge, United KingdomHQ checked Sep 17, 2026	51-200	48 contacts →
	Indirect evidence “Since 1998, Powercor have specialised in every aspect of electrical engineering.” Source: RevenueBase Database · checked Sep 17, 2026
25	Lloyd Morris Electrical LTD	Indirect evidence	Wrexham, United KingdomHQ checked Sep 17, 2026	51-200	47 contacts →
	Indirect evidence “Lloyd Morris Electrical Limited is a company of Electrical Engineers, specialising in the design, manufacture and installation of Electrical Distribution and Control Systems for…” Source: RevenueBase Database · checked Sep 17, 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: rail electrification companies. 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 rail electrification companies.
Partial evidence: Its own public description names part of rail electrification companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name rail electrification companies. 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 711 rail electrification companies based in the United Kingdom

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Rail electrification companies based in the United Kingdom at a glance

As of Sep 17, 2026

34.6%Verified-email coverage

16.2Average contacts per company

11-50Median size (employees)

7.3%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

339

11-50

242

51-200

201-500

501-1,000

1,001-5,000

10001+

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 711 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 rail electrification companies, 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 “rail electrification companies”. 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 rail electrification companies), 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 rail electrification companies, 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, 3,969 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 17, 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.

Rail electrification companies by metro

Rail electrification companies in London52

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 rail electrification companies, 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 rail electrification companies are there based in the United Kingdom?

RevenueBase identified 711 rail electrification companies 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?

Kelly Group, headquartered in Wembley, tops this list with the largest team on record.

Which city has the most rail electrification companies?

London leads with 52 headquartered companies, followed by Manchester (16) and Leeds (10).

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 3,969 verified decision-maker contacts tracked across these 711 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 17, 2026.

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Rail electrification companies by geography

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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.