Nothing, because they used analogue cable I believe (if it's a digital cable box it probably won't work either as Virgin Media hardware lock and encrypt their service, even FTA stuff going through their network I believe).
EDIT: In fact my nan had in her spare room an analogue Birmingham Cable box (one of these beauties)
And one day in 2004/5 it stopped working, she called Telewest as it was then out to look at it (as she had the Active Digital box in the living room, a horrible PACE thing she hated as it kept on overheating and dying) and they laughed and said it should have been replaced at some point in 2003!
EDIT 2: Just did some reading on this, Virgin Media began turning off Analogue in 2008 - alongside DSO, and by November 2013 there were no analogue services offered at all, withdrawing them totally from Milton Keynes and Westminster (where BT own the cables). Customers there can't get digital cable either from VM and BT don't offer the service!
Last edited by Mike W on 30 November 2018 3:53am - 2 times in total