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Presence worldwide

United Kingdom

Colas Rail UK is a leading supplier of railway infrastructure services, constructing and renewing all forms of railways and operating Freight and on Track Plant across UK.

History of the subsidiary

Colas Rail is the result of the merger of two companies acquired by Colas Group. The merger brought together two of Europe’s major players in the railway sector and pooled their respective skills within one entity. Colas Rail UK was formed in 2007, first delivering Track Renewals to the Western region in 2008, entering the track plant market in 2009 and purchasing new tampers in 2010.  From winning our first Network Rail Haulage contract in 2013, we have gone from strength to strength delivering major track infrastructure projects for Network Rail and the Midland Metro Alliance contract in Birmingham.

10 years video:


We are one of the UK’s leading providers of rail infrastructure services and are recognised as one of Network Rail’s five largest contractors. Operating the UK’s largest fleet of On Track Plant and Freight we have secured a series of long term, major contracts and look to the future to continually build long term collaborative relationships with clients and partners.

We specialise in:

  • Track Laying, Renewal and Maintenance.
  • Freight.
  • Light / Metro Lines / Tramways.
  • Operation and Maintenance of On Track Plant.
  • High Voltage and Traction Power.
  • Signalling & Telecomms.
  • Rolling Stock Refurbishment & Maintenance.
  • Multidisciplinary Projects.
  • Design & Surveying.

An industry leader with a forward thinking approach with strong UK expertise and capabilities we:

  • take a collaborative approach to building long term sustainable client relationships;
  • are the largest rail track contractor in the UK with 40% of total market share;
  • offer major project delivery capability.

Major projects

  • Currently delivering the £1.3bn Midland Metro Alliance contract in Birmingham.
  • Delivered Wessex Capacity Alliance delivering circa £400million of improvements for a bigger, better London Waterloo, the UK’s busiest railway station.

Recent contract wins include:

  • Rail Systems Alliance in the South of England worth an estimated £1.5bn (Track work).
  • Signalling and Telecoms (S&T) frameworks for the western region, worth an estimated £75M.
  • Rail Haulage and seasonal service contract worth an estimated £12m per year.


UK Head Office, 25 Victoria Street, London, SW1H 0EX.
(New office location from end of October 2019)

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