I suppose one way could be a service from Stourport on Severn - Hartlebury - Droitwich Spa - Worcester Shrub Hill to Oxford, Reading and London (Waterloo?). Obviously, other towns could be served enroute - don't worry!
The first and third places are large towns without a direct service to London. The first place does not even have a line anymore (axed in the 60s, line ripped up in the 70s/80s when freight ended)! The second place is a village (the former junction)
Of course, my real excuse here is the fact that it would give the Cotswold passengers a different choice of
TOC▸ - but I suppose they would be no better than
FGW▸ !
I know that there would be congestion problems in the Worcester/Reading/London area (making it impractible) but it is idea, which perhaps others could build on/ mould.

Or an extension from Hereford to Ludlow and Shrewsbury etc.??
All ideas!!!