I reckon 2 is Bicester North and Aylesbury to Princes Risborough, High Wycombe, London Paddington and London Marylebone.
Extra station between Aylesbury and Princes Risborough is South Aylesbury Halt which closed on 5 June 1967 around the time period of grahame's timetable.
Yes, it is ... a real thin service from Bicester North, to Paddington, and no Haddenham and Thame Parkway.
so just no. 6 remains.
O/T but Bicester North, was
AFAIK▸ the scene of the last ever slip coach working on
BR▸ .
A coach at the rear of an express train that was detached at line speed, and coasted into the station where it was stopped by the guard. Splendid ! would never be allowed today.
Sometimes the slip coach terminated at the station where it was detached, in other cases it was coupled to a branch line service.
Some trains conveyed several slip coaches.