Company lists · Data refreshed September 2026

Top 25 Railway consulting firms based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 126 companies tracked

RevenueBase identified 126 railway consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 4,182 professional contacts across them, including 1,219 with verified work emails and 186 with mobile numbers. London is the largest hub.

This list covers railway consulting firms headquartered in London, 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 13, 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 13, 2026 86% judged on-target in blind review

126Companies

4,182Contacts tracked

1,219Verified emails

186Mobile numbers

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The 25 largest railway consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 126 railway consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 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 13, 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 13, 2026
2	Systra UK & Ireland	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1,001-5,000	707 contacts →
	Indirect evidence “Helping the world move forward with confidence.” Source: RevenueBase Database · checked Sep 13, 2026
3	Network Rail Consulting	Strong evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
4	Cleshar	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1,001-5,000	236 contacts →
	Indirect evidence “Cleshar delivers multidisciplinary services to the rail infrastructure sector.” Source: RevenueBase Database · checked Sep 13, 2026
5	Rendel Limited	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
6	Campbellreith	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
7	Ardent Consulting Engineers	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
8	Snc-Lavalin Atkins Transport Consulting & Advisory	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
9	1stinrail	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	52 contacts →
	Indirect evidence “1stinrail specialise in Permanent Way Engineering for all track types, from feasibility through to commissioning, and for all forms of track; we provide 24/7 planned and reactive…” Source: RevenueBase Database · checked Sep 13, 2026
10	Poise Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	42 contacts →
	Indirect evidence “We are one of the UK’s leading engineering consultancies providing Multi-disciplinary Design and holistic Project Management in rail, built environment, and energy related sectors.” Source: RevenueBase Database · checked Sep 13, 2026
11	OTB Engineering	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	42 contacts →
	Indirect evidence “OTB is renowned for its expertise and experience in tunnel, construction and geotechnical engineering, and rail assurance.” Source: RevenueBase Database · checked Sep 13, 2026
12	London Bridge Associates LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	38 contacts →
	Indirect evidence “LBA is an engineering consultancy specialising in tunnelling, underground works and heavy civil engineering construction.” Source: RevenueBase Database · checked Sep 13, 2026
13	Markides Associates	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	35 contacts →
	Indirect evidence “Markides Associates is a growing consultancy of transport planners and traffic engineers.” Source: RevenueBase Database · checked Sep 13, 2026
14	Crossrail International CI	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	32 contacts →
	Indirect evidence “Crossrail International is a specialist advisory practice, wholly owned by the UK government's Department for Transport (DfT), that provides strategic advice globally to client…” Source: RevenueBase Database · checked Sep 13, 2026
15	TB Associates	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	32 contacts →
	Indirect evidence “TB Associates was founded in the United Kingdom in 2004 and is a research-based engineering consultancy company.” Source: RevenueBase Database · checked Sep 13, 2026
16	Taylor Airey	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	28 contacts →
	Indirect evidence “Taylor Airey is a leading independent strategy and operations consultancy for the transport industry.” Source: RevenueBase Database · checked Sep 13, 2026
17	Navitas Engineering LTD	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	27 contacts →
	Partial evidence “Navitas Engineering provides electrical engineering consultancy services to the railway and electricity supply industries.” Source: RevenueBase Database · checked Sep 13, 2026
18	Project Leaders LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	25 contacts →
	Indirect evidence “Leader; a person in control of a group or situation”.” Source: RevenueBase Database · checked Sep 13, 2026
19	Rail Reliability	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	20 contacts →
	Partial evidence “Rail Reliability is a South East of England based company set up by two directors who have both been through railway apprenticeships who have now become seasoned consultants in…” Source: RevenueBase Database · checked Sep 13, 2026
20	Ipex Consulting	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	19 contacts →
	Partial evidence “IPEX Consulting is a leading UK-based professional services company specialising in the rail sector.” Source: RevenueBase Database · checked Sep 13, 2026
21	The HUB	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	18 contacts →
	Indirect evidence “The Hub is a specialist transport sector consultancy that brings together strategic and commercial advisory services with deep sector expertise.” Source: RevenueBase Database · checked Sep 13, 2026
22	North Star Consultancy Limited	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	17 contacts →
	Indirect evidence “North Star is formed of a team of consultants providing specialist operational advice and services to the transport industry.” Source: RevenueBase Database · checked Sep 13, 2026
23	EFA Engineering LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	16 contacts →
	Indirect evidence “EFA Engineering is born out of the requirement to find efficiencies within the rail industry.” Source: RevenueBase Database · checked Sep 13, 2026
24	Skylark Consulting Group	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	14 contacts →
	Indirect evidence “Skylark is a management consultancy established by senior transportation and infrastructure experts in May 2018, forming a team with decades of experience in the industry as both…” Source: RevenueBase Database · checked Sep 13, 2026
25	Intelrail LTD	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1-10	11 contacts →
	Indirect evidence “At IntelRail we have the capability to deliver the following services: Switches and Crossings - System Reliability Switches and Crossings – Renewal Switches and Crossing’s –…” Source: RevenueBase Database · checked Sep 13, 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 126 railway consulting firms based in London, United Kingdom

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Railway consulting firms based in London, United Kingdom at a glance

As of Sep 13, 2026

29.1%Verified-email coverage

4.4%Mobile-number coverage

33.2Average contacts per company

1-10Median size (employees)

98.4%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

9610–30

24131–60

761–90

190–180

9180+

Company record updated

Median 79.0d

00–30

1,15731–60

2,26561–90

50290–180

258180+

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 London, 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 London 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, 1,219 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 13, 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 in the United Kingdom

Railway consulting firms in London124
Railway consulting firms in Derby30

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 London, United Kingdom?

RevenueBase identified 126 railway consulting firms headquartered in London, 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 1,219 verified decision-maker contacts tracked across these 126 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 13, 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.