... *mistake*
xx27 and xx57 are ex-Reading
I've had a train service database update for my journey planner, now service pattern is:
xx14 (ex-Windsor)
xx27 (ex-Reading)
xx44 (ex-Windsor)
xx57 (ex-Reading)
The software is also suggesting getting xx05 or xx35 to Weybridge and change there (53 minute journey time).