I just had my quick start kit through and I was told the previous tenant used to have Virgin.
However, looking at the wall socket I only have two connectors; FM and TV. Kind of like this....
My question is, which one should I use to plug the red isolation cable in? When I have time I am going to use some trial and error but I thought it would be better to post here first
That is not a Virgin Media cable socket, that is for a conventional TV 'aerial' connection.
If a previous occupant has had VM then there ought to be a white omnibox on one of the walls where the cable comes into the house, like this