HS2 OCS - Technical Specification & Certification of the UK Wiring Consist

Colas Rail UK intends to procure and operate a Wiring Consist for the installation of contact and catenary wire.

The Consist comprises of two powered modules

Wiring Module a self propelled rail vehicle equipped with a four cable wiring module and two capstans.

Stringing platform a self propelled vehicle equipped with an elevating/rotating platform and one wire positioning unit.

Colas Rail requires specialist technical support from a suitably competent organisation to

Assess and recommend the most appropriate operational and certification strategy for the Wiring Consist.

Identify the applicable UK legislative, standards, compliance and acceptance requirements.

Support the development of a technical specification suitable for procurement and tendering to manufacturers.

Support the definition of the certification and acceptance process for the selected solution.

Provide technical support during manufacturer engagement and subsequent certification activities, as required.

Additional information: The services shall be delivered in accordance with Colas Rail CR2 Professional Services Agreement Terms & Conditions, including applicable HS2-specific provisions; copies will be issued to shortlisted suppliers.

Suppliers to submit their tender proposal by the tender deadline of Thursday 23 July 2026 by email to tr.procurement@colasrail.com.

If you have any questions, please send them to tr.procurement@colasrail.com and we shall endeavour to respond to them at the earliest.