News update: Saturday 21st March & Sunday 22nd March 2020:
Due to Network Rail engineering works between Haddenham & Thame Parkway and Bicester, together with HS2 preparation works at West Ruislip, the line between Marylebone and Bicester is closed at multiple locations. A heavily-amended timetable will operate on all Chiltern Railways routes, and most journeys will be affected. Passengers may need to travel via alternative routes, on other operator’s services, London Underground services and/or rail replacement bus services. Journey times will be considerably longer than usual.