Company lists · Data refreshed September 2026

Top 25 Transit authority engineering services based in the United Kingdom

Name: Transit authority engineering services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 594 companies tracked

RevenueBase identified 594 transit authority engineering services headquartered in the United Kingdom as of September 2026 and tracks 23,053 professional contacts across them, including 8,277 with verified work emails. London is the largest hub.

This list covers transit authority engineering services 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 19, 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 19, 2026 86% judged on-target in blind review

594Companies

23,053Contacts tracked

8,277Verified emails

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The 25 largest transit authority engineering services based in the United Kingdom

Ranked by team size

Top 25 of 594 transit authority engineering services based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to transit authority engineering services: 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	Atkins	Indirect evidence	Epsom, United KingdomHQ checked Sep 19, 2026	10001+	9,297 contacts →
	Indirect evidence “Atkins is now AtkinsRéalis.” Source: RevenueBase Database · checked Sep 19, 2026
2	Faithful Gould	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,194 contacts →
	Indirect evidence “Faithful+Gould is now AtkinsRéalis.” Source: RevenueBase Database · checked Sep 19, 2026
3	Amcogiffen	Indirect evidence	Barnsley, United KingdomHQ checked Sep 19, 2026	1,001-5,000	845 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 19, 2026
4	Systra UK & Ireland	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	707 contacts →
	Indirect evidence “Helping the world move forward with confidence.” Source: RevenueBase Database · checked Sep 19, 2026
5	Aureos	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	583 contacts →
	Strong 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 19, 2026
6	Network Rail Consulting	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	582 contacts →
	Partial evidence “Our Rail Experts Have Transformed The Performance Of Britain’s Railway…They Can Help You Transform Yours Network Rail Consulting is the wholly owned international consultancy arm…” Source: RevenueBase Database · checked Sep 19, 2026
7	Abellio Group	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	456 contacts →
	Partial evidence “Following a management buyout in February 2023, Abellio UK Group is now Transport UK Group.” Source: RevenueBase Database · checked Sep 19, 2026
8	Fairhurst	Indirect evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	201-500	437 contacts →
	Indirect evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 19, 2026
9	VIX Technology	Partial evidence	Manchester, United KingdomHQ checked Sep 19, 2026	201-500	393 contacts →
	Partial evidence “Vix Technology is the global leader in intelligent transportation systems, automated fare collection, and transit analytics.” Source: RevenueBase Database · checked Sep 19, 2026
10	Morson Projects	Partial evidence	Manchester, United KingdomHQ checked Sep 19, 2026	501-1,000	313 contacts →
	Partial evidence “Morson Projects are a reputable multi-disciplinary engineering consultancy with over 40 years’ experience and 950 personnel across the UK and overseas.” Source: RevenueBase Database · checked Sep 19, 2026
11	Dyer & Butler	Strong evidence	Southampton, United KingdomHQ checked Sep 19, 2026	501-1,000	266 contacts →
	Strong 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 19, 2026
12	Project Centre LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	190 contacts →
	Indirect evidence “Project Centre, part of Marston Holdings, is a multidisciplinary infrastructure and place consultancy shaping sustainable spaces across the UK.” Source: RevenueBase Database · checked Sep 19, 2026
13	RSS Infrastructure LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	1,001-5,000	186 contacts →
	Indirect evidence “RSS Infrastructure (RSSI) is an award-winning multi-disciplinary service provider for the rail, construction and utilities sectors.” Source: RevenueBase Database · checked Sep 19, 2026
14	Egis In The UK	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	156 contacts →
	Partial evidence “Egis is a leading global consulting, construction engineering and operating firm.” Source: RevenueBase Database · checked Sep 19, 2026
15	JCK Limited	Indirect evidence	Colnbrook, United KingdomHQ checked Sep 19, 2026	201-500	155 contacts →
	Indirect evidence “Established in 2003, JCK has successfully and consistently been delivering excellent service to clients in our areas of specialism: Mechanical, Electrical & Public Health Building…” Source: RevenueBase Database · checked Sep 19, 2026
16	Rendel Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	150 contacts →
	Partial evidence “Rendel celebrated its 185th Anniversary in 2024, making us one of the oldest civil and structural engineering companies in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
17	Roughton International LTD	Indirect evidence	Chandlers Ford, United KingdomHQ checked Sep 19, 2026	51-200	132 contacts →
	Indirect evidence “Founded in 1952, Roughton is a leading multidisciplinary consultancy delivering projects in Africa, Asia, Eastern Europe, UK, Latin America, the Caribbean and South Pacific.” Source: RevenueBase Database · checked Sep 19, 2026
18	SLC Rail	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	11-50	115 contacts →
	Indirect evidence “At SLC Rail we help government bodies, developers and TOCs to form visionary rail strategies, develop successful rail schemes and manage project delivery.” Source: RevenueBase Database · checked Sep 19, 2026
19	SRC Infrastructure	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	114 contacts →
	Partial evidence “SRC Infrastructure has been providing project management and engineering advisory, consultancy and managed service solutions to UK infrastructure clients for 20 years.” Source: RevenueBase Database · checked Sep 19, 2026
20	Brookbanks	Strong evidence	United KingdomHQ checked Sep 19, 2026	51-200	113 contacts →
	Strong evidence “Project Consultant & Development Partner: Civil, Structural, Mechanical & Electrical Engineering Designs; Highways, Transportation & Environmental; Cost & Commercial & Development…” Source: RevenueBase Database · checked Sep 19, 2026
21	Campbellreith	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	113 contacts →
	Partial evidence “CampbellReith is an independent firm of consulting engineers providing structural, civil, geotechnical, land quality, development planning and transport planning services.” Source: RevenueBase Database · checked Sep 19, 2026
22	Aecom Engineering Uk&i	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	110 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
23	Xrail Group LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	108 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
24	Ardent Consulting Engineers	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	96 contacts →
	Strong evidence “Founded in 2005, Ardent Consulting Engineers provide transport and infrastructure planning and engineering advice to the property and land development industry.” Source: RevenueBase Database · checked Sep 19, 2026
25	BTTC	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	51-200	85 contacts →
	Indirect evidence “BTTC is a high-performance infrastructure project consultancy founded on the principle that our industry can deliver projects ‘better through total collaboration’.” Source: RevenueBase Database · checked Sep 19, 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: transit authority engineering services. 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 transit authority engineering services.
Partial evidence: Its own public description names part of transit authority engineering services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transit authority engineering services. 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 594 transit authority engineering services based in the United Kingdom

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Transit authority engineering services based in the United Kingdom at a glance

As of Sep 19, 2026

35.9%Verified-email coverage

38.8Average contacts per company

1-10Median size (employees)

22.4%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

322

11-50

171

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 594 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 transit authority engineering services, 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 “transit authority engineering services”. 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 transit authority engineering services), 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 transit authority engineering services, 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, 8,277 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 19, 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.

Transit authority engineering services by metro

Transit authority engineering services in London133

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 transit authority engineering services, 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 transit authority engineering services are there based in the United Kingdom?

RevenueBase identified 594 transit authority engineering services 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?

Atkins, headquartered in Epsom, tops this list with the largest team on record.

Which city has the most transit authority engineering services?

London leads with 133 headquartered companies, followed by Manchester (18) and Derby (17).

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 8,277 verified decision-maker contacts tracked across these 594 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 19, 2026.

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Transit authority engineering services 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.