Question to the Department for Transport:

To ask Her Majesty's Government what is the latest design for the HS2 tracks and approach tunnels for Euston station.

The HS2 infrastructure forming the approaches to Euston station consists of (from south to north): a portal structure leading to three sprayed concrete lined tunnels (two Up Line tunnels either side of a single Down Line tunnel). The two Up Lines converge into a sprayed concrete lined cavern and then merge into a single bored tunnel. The Down Line passes underneath one of the Up Line tunnels to merge into a bored tunnel adjacent to the cavern.

A sprayed concrete lined crosscut tunnel, perpendicular to the running tunnels is constructed from a shaft adjacent to Park Village East to facilitate construction of the cavern and provide a permanent intervention facility.