The department currently has no plans to extend the oyster ticketing system to the Three Bridges and Crawley stations. The fare zone structure and the classification of individual stations are covered by the Travelcard Agreement. Train operators are required under their franchises to honour this agreement. Any changes to the Travelcard Agreement, including the inclusion of stations within the oyster ticketing system, must be agreed between TfL and the train operators. Any proposals put forward will be considered by the Secretary of State for Transport on the basis of a business case, and other wider policy initiatives at the time.