Question to the Department for Transport:

To ask His Majesty's Government, further to the Written Answer by Lord Hendy of Richmond Hill on 18 December (HL3382), whether they will publish a cost estimate for the construction of HS2 tunnels from Old Oak Common to Euston before construction work starts; and before its destination and design is published and approved, as required by government procurement rules.

The Euston tunnels' scope is being delivered as part of the SCS Main Works Civils contract, and there are no plans for a new procurement process for this work. Due to commercial sensitivities, the department is unable to provide a specific cost breakdown for the Euston tunnels.

Previously published cost ranges for HS2 Phase One included the costs associated with the Euston tunnels. The Department is currently working with HS2 Ltd to review the Estimate at Completion (EAC) for HS2 Phase One. The results of this review, which include considerations of the Euston tunnels, will report to Parliament in due course.