Company lists · Data refreshed September 2026

Top 25 Railway compliance consulting firms based in London, United Kingdom

Name: Railway compliance 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 29, 2026 70 companies tracked

RevenueBase identified 70 railway compliance consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 1,467 professional contacts across them, including 461 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers railway compliance 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 29, 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 29, 2026 86% judged on-target in blind review

70Companies

1,467Contacts tracked

461Verified emails

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

Ranked by team size

Top 25 of 70 railway compliance consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to railway compliance 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	Network Rail Consulting	Strong evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
2	Cleshar	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	236 contacts →
	Indirect evidence “Cleshar delivers multidisciplinary services to the rail infrastructure sector.” Source: RevenueBase Database · checked Sep 29, 2026
3	1stinrail	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
4	Poise Group	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
5	OTB Engineering	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
6	Navitas Engineering LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
7	Rail Reliability	Partial evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
8	Ipex Consulting	Partial evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
9	The HUB	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
10	North Star Consultancy Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
11	EFA Engineering LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
12	Intelrail LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
13	Rail Power Solutions	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	9 contacts →
	Partial evidence “Established in 2013, Rail Power Solutions (RPS) has grown rapidly to become a well-recognised and leading provider of electrical designs for the railway industry.” Source: RevenueBase Database · checked Sep 29, 2026
14	Xanta Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	9 contacts →
	Indirect evidence “Xanta Limited is an engineering-led management consultancy for the transport industry.” Source: RevenueBase Database · checked Sep 29, 2026
15	Sacyr Neopul UK	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	8 contacts →
	Partial evidence “Sacyr Neopul is part of the multidisciplinary Sacyr Group and is a leading Railway Specialist Company.” Source: RevenueBase Database · checked Sep 29, 2026
16	VA Rail	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	7 contacts →
	Indirect evidence “We are industry leading technical advisors and rail consultants Our vision, purpose and values are: Vision To contribute to the Rail industry’s future prosperity Purpose To add…” Source: RevenueBase Database · checked Sep 29, 2026
17	The Railway Consultancy LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “Specialist railway planning consultancy with expertise in commercial planning, operational planning, and the link between the two.” Source: RevenueBase Database · checked Sep 29, 2026
18	The Formal Route	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Partial evidence “The Formal Route are experts in applying formal methods to verification of high assurance railway systems.” Source: RevenueBase Database · checked Sep 29, 2026
19	Rail Engineering Solutions RES	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	3 contacts →
	Indirect evidence “Rail Engineering Solutions (RES)\| Specialist Support for the UK Rail Industry At Rail Engineering Solutions, we are proud to be the UK rail industry's trusted partner, offering…” Source: RevenueBase Database · checked Sep 29, 2026
20	Symposium Consulting LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “The Symposium team have delivered everything from the bottom up design of a new European rail infrastructure manager to the commercialisation strategy for a national rail telecoms…” Source: RevenueBase Database · checked Sep 29, 2026
21	Turnkey Signal Sighting LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “Turnkey Signal Sighting Ltd are a company that can provide full solutions to Railway Signal Engineering.” Source: RevenueBase Database · checked Sep 29, 2026
22	Power & Rail Solutions	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “Power & Rail Solutions (PRS) is an innovative, progressive company that provide an extensive range of Consultancy, Design and Management services.” Source: RevenueBase Database · checked Sep 29, 2026
23	Eclipse Rail Consultancy LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “Providing consultancy services in the following aspects of Rail: Project Management, Bidding/Mobilisation and Customer Experience/Operations.” Source: RevenueBase Database · checked Sep 29, 2026
24	S&h Consultants	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	1 contacts →
	Indirect evidence “S&H Consultants is a specialist engineering consultancy that delivers high-quality engineering services and supplies skilled engineers to a wide range of organisations within the…” Source: RevenueBase Database · checked Sep 29, 2026
25	Innotrax LTD	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	1 contacts →
	Partial evidence “Railway Engineering Consultancy providing services related to integration and technical management within the railway sector.” Source: RevenueBase Database · checked Sep 29, 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 compliance 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 compliance consulting firms.
Partial evidence: Its own public description names part of railway compliance 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 compliance 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 70 railway compliance consulting firms based in London, United Kingdom

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

As of Sep 29, 2026

31.4%Verified-email coverage

21.0Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 70 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 railway compliance 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 compliance 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 compliance 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 compliance 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, 461 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 29, 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 compliance consulting firms by metro in the United Kingdom

Railway compliance consulting firms in Derby26

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 compliance 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 compliance consulting firms are there based in London, United Kingdom?

RevenueBase identified 70 railway compliance 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?

Network Rail Consulting, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most railway compliance consulting firms?

London leads the United Kingdom with 70 headquartered companies, followed by Derby (26) and Birmingham (10).

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 461 verified decision-maker contacts tracked across these 70 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 29, 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.