if the digibox has an RF output you could run that to the other room and connect the local tv to the scart output of the digibox. the down side is whatever is on the tv in the main room is what is in the other room.the real solution is spend the �20-�25 on another freeview box
Easy - go to Argos and for about �28 you can buy a digital TV sender that you simply plug into both TV's and like magic you can watch it on the second tv - the remote control will even work on it. No wires involved and you don't even need an aeriel on the second TV. I have one and it works perfectly