Question to the Department for Transport:

To ask Her Majesty's Government whether HS2 Ltd used the same methodology to estimate costs on the (1) Area South, (2) Area Central, and (3) Area North, sections of the HS2 Phase One line of route.

HS2 Ltd has utilised a number of methodologies to ensure that its cost estimates are robust, consistent, and appropriate These principles are put in place to enable a common approach for benchmarking across the three Areas of the Phase One line of route, and in order to demonstrate value for money.