OCL ROLE

OCL Rail Recruitment division were the initial chosen labour supply agency to provide between 30 – 40 qualified electricians and electrical mates to assist the Giffen Group as principal contractor on this project with regular full weekend station closure’s incorporated. This formed part of the ongoing investment by London Underground in upgrading the Tube Network including a complete enhanced refurbishment of Warren Street Station.

Upon completion of the required cable containment route, associated core holes and Civils work, OCL were contracted as the specialist cable installation contractor to install all electrical sub-mains cables within the contract time scales, whilst ensuring the minimum amount of disruption to the general public who use the station.

The majority of this work was carried out during engineering hours and a number of planned weekend station closures. However, careful planning was required to maximise the working hours available with the length and size of the cables being installed taken into account. Due to the many different areas of the station to be accessed by the install team, many of these works incorporated bespoke high level cantilever access towers being used on the staircases and elevators. All OCL personnel on site were specifically trained and certificated to use these towers and worked in conjunction with OCL’s certified confined space personnel to complete the works.

All installs undertook vigorous NOWRI inspections and the works carried out by OCL were successfully completed on time and to budget.

Breakdown of works carried out by OCL:

  • Plan, design, and produce drawings of cable routes and intersections eliminating any crossovers or radius non-conformities
  • Plan and schedule call offs for cable installs around station closures and working hours
  • Complete Installation of uninterruptible power supply cables
  • Installation of approx. 3000m of all sub-main cables ranging from 10mm 3-core to large 300mm 4-core SWA
  • Lighting cables in public and Client areas
  • Small power installations
  • Installation of all cable labelling and tie wrapping
  • Installation of all cable cleats and all associated fixings
  • Incorporate bespoke working conditions


Labour Supply & Recruitment




  • 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