London – High Wycombe – Oxford / Birmingham
Timetable Changes – Minor Retimings
Throughout the day, many trains from Marylebone will depart up to 2 minutes earlier or later than normal.
London – Amersham – Aylesbury Vale Parkway
Timetable Changes – Additional Trains
In connection with London Underground engineering works, additional trains will operate between Marylebone and Harrow On The Hill (in both directions) throughout the day.
Trains will operate as normal between Marylebone and stations to Aylesbury Vale Parkway.
Please refer to the attached timetables for full details.