I need to travel Penrith to Sheffield on 14th March (depart 14.45) and then return from Sheffield to Garsdale on the 16th. Time of return is uncertain so can't use advances. Is my best bet to use a return from Carlisle and start and stop short? Will the same ticket permit travel on both the WCML and S&C? Are there any cleverer options? No rail cards. Thanks for any help.