From 5th February many services will be changing mostly within the Aylesbury Vale area. Most of these are minor timing changes to improve the reliability of the services. However, some have more significant route and revised frequencies. All the new timetables can now be found on the timetables pages on this site.
Please see the pdf below for a complete list of services and a summary of the change. If it says No change registered then these routes are unaffected.