Just finished watching a film, went back to the guide and found a programme we wanted to watch is already half way through. It's got the catch up symbol on it, so how do we go back to the start/watch it from the start?
Unless the show that is currently on is being buffered by one of the tuners then you will have to wait for the program to be available on catch up before you can watch it.
The catch up symbol indicates that it will be on catch up at some point but not that it is currently available. If it's a BBC program then it's usually available quite quickly but if it's coming from VM's vod system it can take a few hours or more.