Can I come back on an earlier train?
This depends on the ticket type; flexible tickets can be used on earlier trains providing the earlier train is also within the timings of the ticket purchased. So, for example if you want to travel with a super off-peak ticket you can travel on an earlier train providing it is also a Super off-peak permitted journey. Advance tickets are for the booked train only and if you wish to change to another train using an advance ticket you will have to pay the difference in ticket price. You may also be charged an admin fee.