Company lists · Data refreshed September 2026

Top 25 Public transportation infrastructure companies based in the United Kingdom

Name: Public transportation infrastructure 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 64 companies tracked

RevenueBase identified 64 public transportation infrastructure companies headquartered in the United Kingdom as of September 2026 and tracks 17,232 professional contacts across them, including 2,948 with verified work emails. London is the largest hub.

This list covers public transportation infrastructure 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

64Companies

17,232Contacts tracked

2,948Verified emails

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The 25 largest public transportation infrastructure companies based in the United Kingdom

Ranked by team size

Top 25 of 64 public transportation infrastructure 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 public transportation infrastructure 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	Ferrovial	Partial evidence	Amsterdam, United KingdomHQ checked Sep 17, 2026	10001+	5,782 contacts →
	Partial evidence “Ferrovial is a leading global infrastructure company transforming highways, airports, and energy around the world.” Source: RevenueBase Database · checked Sep 17, 2026
2	Arriva Group	Indirect evidence	Sunderland, United KingdomHQ checked Sep 17, 2026	10001+	3,690 contacts →
	Indirect evidence “Arriva is the leading passenger transport operator in Europe, employing around 36,200 people and delivering 1.5 billion passenger journeys each year, with businesses across 11…” Source: RevenueBase Database · checked Sep 17, 2026
3	FM Conway LTD	Strong evidence	Sevenoaks, United KingdomHQ checked Sep 17, 2026	1,001-5,000	974 contacts →
	Strong evidence “FM Conway is a leading infrastructure services company delivering vital services in transportation, the built environment and open spaces for communities and businesses.” Source: RevenueBase Database · checked Sep 17, 2026
4	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
5	M Group	Partial evidence	Stevenage, United KingdomHQ checked Sep 17, 2026	10001+	851 contacts →
	Partial evidence “M Group \| Essential Infrastructure Services for Life It’s an exceptional time to be part of M Group.” Source: RevenueBase Database · checked Sep 17, 2026
6	Barhale LTD	Indirect evidence	Walsall, United KingdomHQ checked Sep 17, 2026	1,001-5,000	803 contacts →
	Indirect evidence “Barhale was formed in 1980 as a specialist tunnelling contractor and grew initially through the successful delivery of projects in the water sector, developing mechanical and…” Source: RevenueBase Database · checked Sep 17, 2026
7	Octavius Infrastructure	Indirect evidence	Reigate, United KingdomHQ checked Sep 17, 2026	501-1,000	558 contacts →
	Indirect evidence “Bringing people together The Octavius Way, We collaborate with our customers, integrate our suppliers and develop our people to deliver assured, sustainable and efficient…” Source: RevenueBase Database · checked Sep 17, 2026
8	The Go-Ahead Group	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	538 contacts →
	Partial evidence “We are Go-Ahead, a leading international public transport company connecting customers with reliable, punctual and welcoming services, that are accessible to all.” Source: RevenueBase Database · checked Sep 17, 2026
9	Colas LTD	Partial evidence	Birmingham Business Park, United KingdomHQ checked Sep 17, 2026	1,001-5,000	459 contacts →
	Partial evidence “Colas is a world leader in the construction and maintenance of transport infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
10	Abellio Group	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	456 contacts →
	Indirect evidence “Following a management buyout in February 2023, Abellio UK Group is now Transport UK Group.” Source: RevenueBase Database · checked Sep 17, 2026
11	Dyer & Butler	Partial evidence	Southampton, United KingdomHQ checked Sep 17, 2026	501-1,000	266 contacts →
	Partial evidence “Founded in 1979, Dyer & Butler is a multi-disciplined engineering services specialist focused on transport infrastructure including airports, rail and underground.” Source: RevenueBase Database · checked Sep 17, 2026
12	Semperian PPP Investment Partners	Indirect evidence	Bristol, United KingdomHQ checked Sep 17, 2026	51-200	82 contacts →
	Indirect evidence “Semperian owns and manages over 100 assets with a value of £1.3 billion.” Source: RevenueBase Database · checked Sep 17, 2026
13	Ancala	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Partial evidence “Ancala is a leading independent and award-winning infrastructure manager that delivers infrastructure investment differently.” Source: RevenueBase Database · checked Sep 17, 2026
14	ERG International Group	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	34 contacts →
	Partial evidence “Since incorporation in 1972, we have completed numerous significant projects in the power, water and transportation sectors.” Source: RevenueBase Database · checked Sep 17, 2026
15	Gatwick Construction LTD	Partial evidence	Crawley, United KingdomHQ checked Sep 17, 2026	11-50	30 contacts →
	Partial evidence “GENERAL BUSINESS ACTIVITIES Gatwick Construction Limited is a privately owned company established in 2005 to cater specifically for services relating to transport infrastructure…” Source: RevenueBase Database · checked Sep 17, 2026
16	Ascendal Group	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	26 contacts →
	Indirect evidence “At Ascendal, we believe it is time to re-think how cities work.” Source: RevenueBase Database · checked Sep 17, 2026
17	Rock Rail	Partial evidence	City Of London, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Partial evidence “Rock Rail provides innovative financing solutions and asset management services for rolling stock and other rail infrastructure, helping transform rail travel for passengers…” Source: RevenueBase Database · checked Sep 17, 2026
18	Externiture Limited	Strong evidence	Thatcham, United KingdomHQ checked Sep 17, 2026	51-200	16 contacts →
	Strong evidence “Externiture is a leading UK-based designer, manufacturer and installer of public transport infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
19	Severn Lamb	Indirect evidence	Alcester, United KingdomHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “When I am asked what Severn Lamb does, I say we move people.” Source: RevenueBase Database · checked Sep 17, 2026
20	XYZ Rail	Indirect evidence	Penrith, United KingdomHQ checked Sep 17, 2026	51-200	12 contacts →
	Indirect evidence “We are a leading provider of innovative and efficient rail and non-rail building & civil engineering projects in the UK, with a reputation for delivering high-quality projects…” Source: RevenueBase Database · checked Sep 17, 2026
21	A2b Global Media LTD	Indirect evidence	Exeter, United KingdomHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “Through our brands: railway-news.com, airportindustry-news.com, bus-news.com and futuretransport-news.com – a2b Global Media Ltd provides readers with the latest news, information…” Source: RevenueBase Database · checked Sep 17, 2026
22	Init UK	Indirect evidence	Nottingham, United KingdomHQ checked Sep 17, 2026	201-500	10 contacts →
	Indirect evidence “INIT is the worldwide leading supplier of integrated planning, dispatching, telematics and ticketing systems for buses and trains.” Source: RevenueBase Database · checked Sep 17, 2026
23	Railway Support Services Limited	Partial evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	11-50	9 contacts →
	Partial evidence “RAILWAY SUPPORT SERVICES LIMITED is a transportation/trucking/railroad company based out of 181-183 SUMMER ROAD SUMMER ROAD ERDINGTON, BIRMINGHAM, United Kingdom.” Source: RevenueBase Database · checked Sep 17, 2026
24	Rock Group	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Rock Group is the parent company to Rock Rail and Rock Road which provide innovative financing solutions and asset management services for rolling stock and zero emission buses…” Source: RevenueBase Database · checked Sep 17, 2026
25	C-T Aviation Solutions Limited T A C-Tas	Partial evidence	Basingstoke, United KingdomHQ checked Sep 17, 2026	1-10	6 contacts →
	Partial evidence “C-TAS specialises in the planning, design and delivery of multi-modal infrastructure solutions.” 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: public transportation infrastructure 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 public transportation infrastructure companies.
Partial evidence: Its own public description names part of public transportation infrastructure companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name public transportation infrastructure 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 64 public transportation infrastructure companies based in the United Kingdom

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Public transportation infrastructure companies based in the United Kingdom at a glance

As of Sep 17, 2026

17.1%Verified-email coverage

269.2Average contacts per company

11-50Median size (employees)

29.7%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 64 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 public transportation infrastructure 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 “public transportation infrastructure 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 public transportation infrastructure 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 public transportation infrastructure 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, 2,948 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.

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 public transportation infrastructure 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 public transportation infrastructure companies are there based in the United Kingdom?

RevenueBase identified 64 public transportation infrastructure 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?

Ferrovial, headquartered in London, tops this list with the largest team on record.

Which city has the most public transportation infrastructure companies?

London leads with 19 headquartered companies, followed by Birmingham (4) and Liverpool (2).

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 2,948 verified decision-maker contacts tracked across these 64 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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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.