My idea is for Chiltern to run a Marylebone-Oxford-Worcester-Kidderminster-Birmingham-Banbury-Marylebone circuit. This would entail a reversal at Oxford in each direction. Nevertheless if you extrapolate existing journey times and add a 7 minute reversal allowance you get the following:
MARYLEBONE 00:00
OXFORD 01:05/01:12
WORCS SH 02:30/02:35
KIDDERMINSTER 02:55
SNOW HILL 03:30/03:35
BANBURY 04:30
MARYLEBONE 05:30
These timings allow for several intermediate stops, so could be accelerated if say Marylebone to Oxford ran non stop and Banbury to Marylebone likewise; also Worcester to Snow Hill is generous but realistic.
I would imagine the train using some existing paths, but Worcester to Snow Hill might need to be a new path, the whole route perhaps at 2 hourly intervals?
Not sure about the reverse direction, but would form a useful route avoiding changes at New St and relieving pressure on some XC routes.
MARYLEBONE 00:00
OXFORD 01:05/01:12
WORCS SH 02:30/02:35
KIDDERMINSTER 02:55
SNOW HILL 03:30/03:35
BANBURY 04:30
MARYLEBONE 05:30
These timings allow for several intermediate stops, so could be accelerated if say Marylebone to Oxford ran non stop and Banbury to Marylebone likewise; also Worcester to Snow Hill is generous but realistic.
I would imagine the train using some existing paths, but Worcester to Snow Hill might need to be a new path, the whole route perhaps at 2 hourly intervals?
Not sure about the reverse direction, but would form a useful route avoiding changes at New St and relieving pressure on some XC routes.