Company lists · Data refreshed September 2026

Top 25 Railway consulting firms based in the United Kingdom

Name: Railway consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 608 companies tracked

RevenueBase identified 608 railway consulting firms headquartered in the United Kingdom as of September 2026 and tracks 10,647 professional contacts across them, including 3,774 with verified work emails and 465 with mobile numbers. London is the largest hub.

This list covers railway consulting firms 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 5, 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 5, 2026 86% judged on-target in blind review

608Companies

10,647Contacts tracked

3,774Verified emails

465Mobile numbers

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The 25 largest railway consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 608 railway consulting firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to railway consulting firms: 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	Colas Rail UK	Partial evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
2	Volkerrail LTD	Partial evidence	Doncaster, United KingdomHQ checked Sep 5, 2026	1,001-5,000	767 contacts →
	Partial 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 5, 2026
3	Network Rail Consulting	Strong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	582 contacts →
	Strong 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 5, 2026
4	QTS Group	Partial evidence	Strathaven, United KingdomHQ checked Sep 5, 2026	501-1,000	486 contacts →
	Partial evidence “QTS is one of the country’s leading railways contractors, founded by MD, Alan McLeish.” Source: RevenueBase Database · checked Sep 5, 2026
5	Fairhurst	Partial evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	201-500	437 contacts →
	Partial 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 5, 2026
6	ISS LTD	Indirect evidence	Salford, United KingdomHQ checked Sep 5, 2026	51-200	286 contacts →
	Indirect evidence “The ISS Management team has over 25 years experience of delivering innovative and pro-active solutions to the rail and light-rail industry.” Source: RevenueBase Database · checked Sep 5, 2026
7	Cleshar	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	236 contacts →
	Indirect evidence “Cleshar delivers multidisciplinary services to the rail infrastructure sector.” Source: RevenueBase Database · checked Sep 5, 2026
8	RSS Infrastructure LTD	Indirect evidence	Birmingham, United KingdomHQ checked Sep 5, 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 5, 2026
9	Ontrak UK LTD	Partial evidence	Greenwich, United KingdomHQ checked Sep 5, 2026	201-500	159 contacts →
	Partial evidence “About Ontrak Recruitment and Training Ontrak Recruitment and Training is a leading temporary staffing agency dedicated to the dynamic railway industry in the United Kingdom.” Source: RevenueBase Database · checked Sep 5, 2026
10	Rendel Limited	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	150 contacts →
	Indirect 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 5, 2026
11	TES 2000 LTD	Indirect evidence	Colchester, United KingdomHQ checked Sep 5, 2026	201-500	142 contacts →
	Indirect evidence “TES Ltd is a long established, highly regarded contractor to the rail industry.” Source: RevenueBase Database · checked Sep 5, 2026
12	Trackwork Limited	Indirect evidence	Doncaster, United KingdomHQ checked Sep 5, 2026	201-500	141 contacts →
	Indirect 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 5, 2026
13	SLC Rail	Indirect evidence	Birmingham, United KingdomHQ checked Sep 5, 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 5, 2026
14	Campbellreith	Partial evidence	London, United KingdomHQ checked Sep 5, 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 5, 2026
15	Loram UK LTD	Indirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	111 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
16	Xrail Group LTD	Indirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	108 contacts →
	Indirect 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 5, 2026
17	Ardent Consulting Engineers	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	96 contacts →
	Partial 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 5, 2026
18	Crouch Waterfall & Partners LTD	Strong evidence	Bradley Stoke, United KingdomHQ checked Sep 5, 2026	51-200	96 contacts →
	Strong evidence “Crouch Waterfall is an established firm of Civil, Structural and Geotechnical Consulting Engineers with extensive experience of Railways, Buildings, Roads, Bridges and Waterways.” Source: RevenueBase Database · checked Sep 5, 2026
19	Transport Investigations Limited	Indirect evidence	Ramsgate, United KingdomHQ checked Sep 5, 2026	51-200	88 contacts →
	Indirect evidence “ABOUT US: Transport Investigations has over eighteen years’ experience of innovation in supporting Train Operating Companies in developing smarter strategies for specialised areas…” Source: RevenueBase Database · checked Sep 5, 2026
20	Aegis Rail	Indirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	79 contacts →
	Indirect evidence “AEGIS is a member of the IKOS Group, a global consultancy business with its Headquarters in Paris, France.” Source: RevenueBase Database · checked Sep 5, 2026
21	DJ Civil Engineering Limited	Indirect evidence	Oldham, United KingdomHQ checked Sep 5, 2026	201-500	76 contacts →
	Indirect evidence “DJ CIVIL ENGINEERING LIMITED has earned the reputation of being an organisation that prioritises the demands and requirements of its clients and the safety of its employees.” Source: RevenueBase Database · checked Sep 5, 2026
22	CK Rail	Indirect evidence	Chesterfield, United KingdomHQ checked Sep 5, 2026	51-200	72 contacts →
	Indirect evidence “CK Rail blends over 70 years of combined civil engineering and construction services, with expertise from former Network Rail trained staff.” Source: RevenueBase Database · checked Sep 5, 2026
23	Snc-Lavalin Atkins Transport Consulting & Advisory	Partial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	67 contacts →
	Partial evidence “Transport Consulting & Advisory is an independent global multi-modal transport sector strategy consultancy, transforming our clients’ businesses through transport planning…” Source: RevenueBase Database · checked Sep 5, 2026
24	DB ESG	Indirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	66 contacts →
	Indirect evidence “DB ESG, established in 1995, is a specialist provider of rolling stock engineering solutions for the UK rail industry.” Source: RevenueBase Database · checked Sep 5, 2026
25	SEP Rail Services	Partial evidence	Middlesbrough, United KingdomHQ checked Sep 5, 2026	51-200	65 contacts →
	Partial evidence “A unique pre-construction services company, we work with contractors, consultants, construction firms and more, measuring, modelling and engineering the nation’s railways.” Source: RevenueBase Database · checked Sep 5, 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: railway consulting firms. 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 railway consulting firms.
Partial evidence: Its own public description names part of railway consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name railway consulting firms. 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 608 railway consulting firms based in the United Kingdom

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Railway consulting firms based in the United Kingdom at a glance

As of Sep 5, 2026

35.4%Verified-email coverage

4.4%Mobile-number coverage

17.5Average contacts per company

1-10Median size (employees)

20.4%Largest-city concentration · London

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

327

11-50

169

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

3,5370–30

22431–60

161–90

290–180

10180+

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 railway consulting firms, 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 “railway consulting firms”. 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 railway consulting firms), 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 railway consulting firms, 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, 3,774 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 5, 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.

Railway consulting firms by metro

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 railway consulting firms, 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 railway consulting firms are there based in the United Kingdom?

RevenueBase identified 608 railway consulting firms 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?

Colas Rail UK, headquartered in London, tops this list with the largest team on record.

Which city has the most railway consulting firms?

London leads with 124 headquartered companies, followed by Derby (30) and Manchester (13).

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 3,774 verified decision-maker contacts tracked across these 608 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 5, 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.