Old Dalby Test Track


OCL was extremely proud to be awarded this particular contract as the specialist installation sub-contractor at this extremely important stage of the ATC (automatic train control) project.

OCL successfully installed, ahead of schedule and on budget, a high standard CRMS (cable route management systems) for Old Dalby test track. The whole contract, valued at £354million, is reportedly the largest of any metro re-signalling contract undertaken worldwide. It will ensure that the CITYFLO 650 system minimises network disruption for London Underground’s passenger through greater reliability and performance. Our work set a standard and became a key element in the upgrade of the SSR (Sub Surface Rail) network.

We had a sixteen man installation team that were certified for both London Underground and Network Rail infrastructures along with being fully aware of all installation standards over the complete area.


The full scope of the London Underground contract is for the signalling renewal and provision of an ATC system for the four sub-surface lines. In time this will carry 1.3 million passengers a day. Together, the lines comprise 40% of the entire network and carry 25% of the total ridership. The testing at Old Dalby forms part of a significant package of works under the ATC Programme for London Underground. This requires signalling and testing works for the introduction of new sub-surface trains which are rigorously tested at the Old Dalby test track before being put into service on the London Underground network. The new CRMS and Civils work installed by OCL played a crucial part in the first stages of enabling for all other testing to take place and prove conformity for the new ‘S’ stock trains and its associated equipment. The new ‘S’ stock trains will run between Amersham and Harrow on the Hill, Richmond to Gunnersbury, Barking and Wimbledon to East Putney.

The objective of the project is to guarantee reliable service of the new ‘S’ stock trains on the London Underground network.

Breakdown of works carried out by OCL:

  • Installation of C.1.7 , C.1.8, C.1.9 concrete troughs
  • Installation of bridge works
  • Installation of unistrut transitions
  • Installation of concrete bases and foundations
  • Installation of steel posts and ground anchors (anchor system)
  • Installation of bespoke GRP unistrut, posts and GRP hangers to accommodate the OLE system
  • Installation of 4 way and 6 way hangers
  • Installation of steel base plate with concrete pads
  • Remedial works to existing raised GRC trough routes
  • Earthing and bonding
  • Completing test and inspections of all installed works (ITP)
  • Recalibrate track measurements and clearances where required to form new AOC
  • Complete all red line drawings for hand over purposes

Labour Supply & Recruitment

    I can confirm the OCL group have conducted themselves in every aspect of their works with excellence . They have recently worked for us completing our coper instalments at purely station. The works are to satisfaction with zero snags .
  • Dhaud Sardar
    OCL Rail was contracted by CCS to carry out a platform and canopy refurbishment package of works at Great Chesterford station these works incorporated varied tasks including platform resurfacing, drainage installation, tactile and coper resurfacing, painting and brickwork along with roofing elements, this Package was delivered on time and on budget with no Snags.
    Dhaud Sardar
    Cleshar Contract Services Ltd
  • Craig Keogh
    Many thanks to OCL for the works carried out on SSE Rail sites in 2018. The LUL premises Engineer inspected both Ruislip, Northwood on Tuesday and was highly impressed with the standard of the works attention to detail throughout the OCL works. Both OCL SER sites have been very well planned managed, OCL site manager has always planned ahead and worked collaboratively with SSE to foresee and help resolve technical issues well in advance of installing the works. The LUL Premises engineer was very happy with the standard of the delivery from OCL stated that LUL may use the 2.no sites as an example of an ideal site for other contractors. The delivery of these SER works are a credit to Mat and the team; as above, all your staff have been a pleasure to work with throughout 2018.
    Craig Keogh
    Project Manager (SER Contract 6A) - SSE Rail Enterprise
  • Paul Mansell
    OCL have carried out many civils and electrical projects for myself for over the past 10 years within the rail sector. They deliver what is required when needed and are trustworthy therefore I have no problem in recommending them.
    Paul Mansell
    Contracts Director Fourway Communications
  • Lee Goodacre
    I would like to thank all at OCL for a great job carried out by your staff over the 52 hour week end possession at Hockley station. The Pre planning meetings and OCL's early engagement with Braybrook really helped the smooth delivery of this project. A very professional job was done right first time, with no snags, we certainly look forward to using OCL in collaboration on future projects.
    Lee Goodacre
    Managing Director - Braybrook Building and Rail and Contractors
  • Sean Gutsell
    OCL Rail in conjunction with the Giffen Group carried out a number of varied installation projects at Neasden Depot the quality of their work and collaborative approach contributed greatly to the success in delivery of the projects involved with NDUP. I would have no hesitation in recommending OCL Rail for future works.
    Sean Gutsell
    Construction Manager TFL‚ NDUP- SSR Upgrade
  •   Carl Messer
    I have used OCL for over 8 years now not only as a labour agency but also carrying out contracted price work for the Giffen Group, I have always been extremely pleased with not only the efficiency of their service but the quality of their work.
    Carl Messer
    Head of Operations LUL – Giffen Group
  • Lloyd Jenkins
    I have worked with OCL Group on several rail projects. I have been very impressed by their professional, customer orientated approach to all aspects of works. They are a contractor who consistently deliver a high quality end product at a competitive price with attention to detail and I would not hesitate to recommend OCL Group for rail related projects.
    Lloyd Jenkins
    Professional Head of Infrastructure - Old Dalby Test Track
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