Question to the Department for Transport:

To ask the Secretary of State for Transport, what information her department holds on the potential benefit of the (a) construction and (b) operation of a western rail link to Heathrow Airport on (i) trends in the level of economic growth (ii) the environment and (iii) civil society.

The economic and societal benefits of a western rail link to Heathrow Airport were previously assessed as part of a business case development process which concluded in 2021. No further work to assess the benefits of a rail link has been undertaken by DfT since then, as Heathrow expansion plans were not progressed at the time. Given changes in commuter and leisure travel patterns and the wider economy since that time, the benefits of any such scheme will need to be revisited. Any promoter is expected to develop a clear surface access strategy as part of their expansion plans, and any necessary surface access improvements will be financed through private funding.