Company lists · Data refreshed September 2026

Top 25 Railway electrification companies based in the United Kingdom

Name: Railway 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 443 companies tracked

RevenueBase identified 443 company matches for railway electrification companies associated with the United Kingdom as of September 2026 and tracks 10,039 professional contacts across them, including 3,643 with verified work emails. London is the largest hub.

This list covers company matches for railway electrification companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

443Companies

10,039Contacts tracked

3,643Verified emails

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The 25 largest railway electrification companies based in the United Kingdom

Ranked by team size

Top 25 of 443 company matches for railway electrification companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Kelly Group	Exact match	Wembley, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	1,053 contacts →
	Exact match “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Colas Rail UK	Exact match	London, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	868 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Volkerrail LTD	Exact match	Doncaster, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	767 contacts →
	Exact match “Since entering the construction market in 1935, VolkerRail has become one of the UK’s leading multidisciplinary railway infrastructure contractors.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Freedom	Exact match	Leeds, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	664 contacts →
	Exact match “Freedom is a leading provider of facilities and power engineering services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Aureos	Exact match	London, United KingdomHQ recorded Sep 17, 2026	1,001-5,000	583 contacts →
	Exact match “Aureos is a multi-disciplinary energy, transport networks specialist and engineering services provider, spanning the design, engineering, installation, maintenance, and crisis…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	QTS Group	Exact match	Strathaven, United KingdomHQ recorded Sep 17, 2026	501-1,000	486 contacts →
	Exact match “QTS is one of the country’s leading railways contractors, founded by MD, Alan McLeish.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	SPL Powerlines Uk&i	Exact match	Coatbridge, United KingdomHQ recorded Sep 17, 2026	501-1,000	337 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Pod-Trak	Exact match	Uxbridge, United KingdomHQ recorded Sep 17, 2026	201-500	221 contacts →
	Exact match “Pod-Trak is a privately owned, multi-disciplinary infrastructure contractor operating across the UK, Ireland, and Europe since 2007.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	IQA Elecnor	Exact match	Glasgow, United KingdomHQ recorded Sep 17, 2026	201-500	184 contacts →
	Exact match “IQA lead the way in designing, building, maintaining, and upgrading electrical utility networks, telecommunication networks, EVCP and electrical infrastructure for both the public…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	TES 2000 LTD	Exact match	Colchester, United KingdomHQ recorded Sep 17, 2026	201-500	142 contacts →
	Exact match “TES Ltd is a long established, highly regarded contractor to the rail industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Trackwork Limited	Exact match	Doncaster, United KingdomHQ recorded Sep 17, 2026	201-500	141 contacts →
	Exact match “Trackwork Ltd is a specialist rail infrastructure engineering company providing the following services & products: • Track renewals, remodelling, installation & maintenance.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Darke & Taylor LTD	Exact match	Oxfordshire, United KingdomHQ recorded Sep 17, 2026	51-200	112 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Xrail Group LTD	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	108 contacts →
	Exact match “WELCOME TO XRAIL Drawing on years of experience within major rail operators across all levels, we offer a higher quality precision engineering service to tackle the most…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Rock Power Connections LTD	Exact match	Bromsgrove, United KingdomHQ recorded Sep 17, 2026	51-200	105 contacts →
	Exact match “Rock Power Connections are experts in electrical connections with a proven track record of quality and safety.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	GTDS	Exact match	Hill, United KingdomHQ recorded Sep 17, 2026	51-200	82 contacts →
	Exact match “GTDS was established in July 2004 to provide specialist installation and commissioning services to the major manufacturers, National Grid and the Distribution Network Operators…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Global Substation Solutions LTD	Exact match	Hebburn, United KingdomHQ recorded Sep 17, 2026	51-200	75 contacts →
	Exact match “Established in 2006, Global Substation Solutions Ltd (GSS) are a dynamic power system engineering company, providing turnkey project services to the UK and international…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	AMARO	Exact match	London, United KingdomHQ recorded Sep 17, 2026	51-200	64 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Avidety	Exact match	Sittingbourne, United KingdomHQ recorded Sep 17, 2026	51-200	56 contacts →
	Exact match “Avidety specialise in the construction and maintenance of overhead and underground electricity networks.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Hvss High Voltage Substation Services LTD	Exact match	Watford, United KingdomHQ recorded Sep 17, 2026	11-50	55 contacts →
	Exact match “HVSS (High Voltage Substation Services) was formed in 2009 specializing in installation and commissioning of High Voltage Substations Systems up to 400kV.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	RJ Power	Exact match	Sidcup, United KingdomHQ recorded Sep 17, 2026	51-200	53 contacts →
	Exact match “RJ Power Group is a specialist electrical contracting business, providing engineering solutions in the power sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Lundy Projects LTD	Exact match	Stockport, United KingdomHQ recorded Sep 17, 2026	51-200	51 contacts →
	Exact match “Lundy Projects is an award-winning multi-disciplinary civil engineering company with an excellent reputation for delivering major signalling and OLE infrastructure projects…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Rail OP OHL Limited	Exact match	East Anglia, United KingdomHQ recorded Sep 17, 2026	51-200	51 contacts →
	Exact match “Rail Op OHL Ltd is a long established and highly regarded Electrification contractor to the Rail Industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Sonic Rail Services LTD	Exact match	Burnham-on-crouch, United KingdomHQ recorded Sep 17, 2026	51-200	49 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Powercor LTD	Exact match	Weybridge, United KingdomHQ recorded Sep 17, 2026	51-200	48 contacts →
	Exact match “Since 1998, Powercor have specialised in every aspect of electrical engineering.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Lloyd Morris Electrical LTD	Exact match	Wrexham, United KingdomHQ recorded Sep 17, 2026	51-200	47 contacts →
	Exact match “Lloyd Morris Electrical Limited is a company of Electrical Engineers, specialising in the design, manufacture and installation of Electrical Distribution and Control Systems for…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “railway electrification companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 443 railway electrification companies based in the United Kingdom

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Railway electrification companies based in the United Kingdom at a glance

As of Sep 17, 2026

36.3%Verified-email coverage

22.7Average contacts per company

11-50Median size (employees)

9.9%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

180

11-50

159

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 443 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United Kingdom whose business descriptions match “railway electrification companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,643 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “railway electrification companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many railway electrification companies are there based in the United Kingdom?

RevenueBase identified 443 company matches for railway electrification companies associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Kelly Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most railway electrification companies?

London leads with 44 company records, followed by Manchester (12) and Glasgow (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,643 professional contacts with verified work emails tracked across these 443 companies; direct dials are available where recorded.

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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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.