Question to the Department for Transport:

To ask the Secretary of State for Transport, what assessment she has made of the potential implications for her policies of Chiltern Railways' proposals to bring in (a) replacement and (b) additional carriages to improve capacity on their existing routes.

The Department continues to work closely with Chiltern Railways to support the delivery of its long-term fleet strategy and has recently approved Chiltern Railways’ Mk3 fleet replacement Outline Business Case (OBC). Chiltern now needs to produce the Final Business Case.

Chiltern also continues to review opportunities to maximise its passenger capacity within its current train fleet. In June 2024, Chiltern introduced an additional morning and evening peak service on Tuesdays, Wednesdays, and Thursdays, between London Marylebone and Princes Risborough, which operated pre-COVID-19. This provides additional seating capacity in response to customer demand and crowding.