Question to the Department for Transport:

To ask Her Majesty's Government, further to the Written Answer by Baroness Vere of Norbiton 9 October (HL8505), what procedure was used to change the location of the Chiltern Tunnel North Portal at Frith Hill in South Heath on the HS2 Phase One line of route; and whether the move was authorised by a Transport and Works Act 1992 Order or another procedure.

As set out in my written answer of 9 October, the location of the Chiltern Tunnel North Portal was changed by means of an Additional Provision (known as AP4) to the then HS2 Phase One Bill, introduced on 12 October 2015. The changes brought about by AP4 are part of the Phase One Act which subsequently received Royal Assent in 2017. The change does not therefore require a Transport and Works Act Order and none has been sought.