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, how directly it supports the match, 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 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

608Companies

10,647Contacts tracked

3,774Verified emails

465Mobile numbers

Explore all 608 companies → Free signup · no credit card · 500 free credits

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. Evidence rates how directly each company's own description names railway consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Colas Rail UKPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	868
	“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: company website · checked Sep 5, 2026
2	Volkerrail LTDPartial evidence	Doncaster, United KingdomHQ checked Sep 5, 2026	1,001-5,000	767
	“Since entering the construction market in 1935, VolkerRail has become one of the UK’s leading multidisciplinary railway infrastructure contractors.” Source: company website · checked Sep 5, 2026
3	Network Rail ConsultingStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	582
	“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: company website · checked Sep 5, 2026
4	QTS GroupPartial evidence	Strathaven, United KingdomHQ checked Sep 5, 2026	501-1,000	486
	“QTS is one of the country’s leading railways contractors, founded by MD, Alan McLeish.” Source: company website · checked Sep 5, 2026
5	FairhurstPartial evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	201-500	437
	“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: company website · checked Sep 5, 2026
6	ISS LTDIndirect evidence	Salford, United KingdomHQ checked Sep 5, 2026	51-200	286
	“The ISS Management team has over 25 years experience of delivering innovative and pro-active solutions to the rail and light-rail industry.” Source: company website · checked Sep 5, 2026
7	ClesharIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	236
	“Cleshar delivers multidisciplinary services to the rail infrastructure sector.” Source: company website · checked Sep 5, 2026
8	RSS Infrastructure LTDIndirect evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	1,001-5,000	186
	“RSS Infrastructure (RSSI) is an award-winning multi-disciplinary service provider for the rail, construction and utilities sectors.” Source: company website · checked Sep 5, 2026
9	Ontrak UK LTDPartial evidence	Greenwich, United KingdomHQ checked Sep 5, 2026	201-500	159
	“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: company website · checked Sep 5, 2026
10	Rendel LimitedIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	150
	“Rendel celebrated its 185th Anniversary in 2024, making us one of the oldest civil and structural engineering companies in the UK.” Source: company website · checked Sep 5, 2026
11	TES 2000 LTDIndirect evidence	Colchester, United KingdomHQ checked Sep 5, 2026	201-500	142
	“TES Ltd is a long established, highly regarded contractor to the rail industry.” Source: company website · checked Sep 5, 2026
12	Trackwork LimitedIndirect evidence	Doncaster, United KingdomHQ checked Sep 5, 2026	201-500	141
	“Trackwork Ltd is a specialist rail infrastructure engineering company providing the following services & products: • Track renewals, remodelling, installation & maintenance.” Source: company website · checked Sep 5, 2026
13	SLC RailIndirect evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	11-50	115
	“At SLC Rail we help government bodies, developers and TOCs to form visionary rail strategies, develop successful rail schemes and manage project delivery.” Source: company website · checked Sep 5, 2026
14	CampbellreithPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	113
	“CampbellReith is an independent firm of consulting engineers providing structural, civil, geotechnical, land quality, development planning and transport planning services.” Source: company website · checked Sep 5, 2026
15	Loram UK LTDIndirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	111
	Source: company website · checked Sep 5, 2026
16	Xrail Group LTDIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	108
	“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: company website · checked Sep 5, 2026
17	Ardent Consulting EngineersPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	96
	“Founded in 2005, Ardent Consulting Engineers provide transport and infrastructure planning and engineering advice to the property and land development industry.” Source: company website · checked Sep 5, 2026
18	Crouch Waterfall & Partners LTDStrong evidence	Bradley Stoke, United KingdomHQ checked Sep 5, 2026	51-200	96
	“Crouch Waterfall is an established firm of Civil, Structural and Geotechnical Consulting Engineers with extensive experience of Railways, Buildings, Roads, Bridges and Waterways.” Source: company website · checked Sep 5, 2026
19	Transport Investigations LimitedIndirect evidence	Ramsgate, United KingdomHQ checked Sep 5, 2026	51-200	88
	“ABOUT US: Transport Investigations has over eighteen years’ experience of innovation in supporting Train Operating Companies in developing smarter strategies for specialised areas…” Source: company website · checked Sep 5, 2026
20	Aegis RailIndirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	79
	“AEGIS is a member of the IKOS Group, a global consultancy business with its Headquarters in Paris, France.” Source: company website · checked Sep 5, 2026
21	DJ Civil Engineering LimitedIndirect evidence	Oldham, United KingdomHQ checked Sep 5, 2026	201-500	76
	“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: company website · checked Sep 5, 2026
22	CK RailIndirect evidence	Chesterfield, United KingdomHQ checked Sep 5, 2026	51-200	72
	“CK Rail blends over 70 years of combined civil engineering and construction services, with expertise from former Network Rail trained staff.” Source: company website · checked Sep 5, 2026
23	Snc-Lavalin Atkins Transport Consulting & AdvisoryPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	67
	“Transport Consulting & Advisory is an independent global multi-modal transport sector strategy consultancy, transforming our clients’ businesses through transport planning…” Source: company website · checked Sep 5, 2026
24	DB ESGIndirect evidence	Derby, United KingdomHQ checked Sep 5, 2026	51-200	66
	“DB ESG, established in 1995, is a specialist provider of rolling stock engineering solutions for the UK rail industry.” Source: company website · checked Sep 5, 2026
25	SEP Rail ServicesPartial evidence	Middlesbrough, United KingdomHQ checked Sep 5, 2026	51-200	65
	“A unique pre-construction services company, we work with contractors, consultants, construction firms and more, measuring, modelling and engineering the nation’s railways.” Source: company website · checked Sep 5, 2026

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

1-10Median size (employees)

LondonLargest hub · 124 HQs

465Contacts with mobile numbers

Sep 5, 2026Data 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

Verified emails by last verification

0–30

3,537

31–60

224

61–90

90–180

180+

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 evidence 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 SmartSearch, 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.
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 an evidence 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

Railway consulting firms in London124
Railway consulting firms in Derby30

Frequently asked

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 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.