I am confused. Virgin does not use satellite -it uses cable.
If you only have one box you can only see one channel, no matter how many tv are connected to it.
Were you able to view two different digital stations before? If so, did you have two boxes?
You should still be able to get terestial channels down the aerial which you can view without the virgin box.
If you do have an aerial, you could buy a cheap freeview box and watch freeview tv on one television and virgin on the other.