Written question asked by Lord Berkeley (Labour) on Thursday, 29 January 2026, in the House of Lords. It was due for an answer on Thursday, 12 February 2026. It was answered by Lord Hendy of Richmond Hill (Labour) on Wednesday, 11 February 2026 on behalf of the Department for Transport.

High Speed 2 Line: Tunnels

Question: To ask His Majesty's Government what the names of the six major rail tunnel and road milestones completed ahead of schedule in 2025 are, as cited by Rt Hon Darren Jones MP in their announcement on 27 January of the start of boring work on the tunnels between Old Oak Common and Euston.

Answer

The six major rail tunnel and road milestones completed ahead of schedule in 2025 are as follows:

Milestone	Planned Date	Actual Date
A46 – completion of structure – road re-opened	May-25	Apr-25
Bromford tunnel – tunnel boring machine (TBM) 2 (Elizabeth) breakthrough	Dec-25	Oct-25
Station Road alignment – installation of precast beams on HS2 and National Rail overbridges (Calvert)	Oct-25	Aug-25
Section 5 structure finish for Greatworth Green tunnel	Jul-25	May-25
Euston tunnels downline TBM – assemble / install tail skin and screw conveyor	Apr-25	Mar-25
Northolt tunnels east down line tunnel boring machine extracted at Green Park Way vent shaft	Nov-25	Aug-25

Secondary information

Type: Written question
Reference: HL14091
Session: 2024-26
Subjects: Construction High Speed 2 line Tunnels Old Oak Common Station Euston Station
Contains statistics: Yes
Link: View this Written question on www.parliament.uk