Question to the Department for Transport:

To ask the Secretary of State for Transport, how much notice rail companies are required to give before altering the number of coaches on a train service.

Train operating companies plan the formations for their rolling stock deployment, using their available fleet to match expected demand. Planned and unplanned adjustments to this may occur for a range of reasons such as engineering works, special events, faults or failures. When making the decision to alter the number of coaches on a train service, train operating companies provide advice to customer information systems wherever possible, but there is no stipulated requirement for a discrete notice period.