I have just found out sky have gone into my exchange,i use a wired router for my present bb connection will this be ok for sky bb or has it got to be a wireless connection.
True, but I guess you have to use it at least once to extract the username and password Good point about the router offering wired connection, kind of answers the question.
The router Sky provide is a 'wireless' router but it does also have 4 ethernet ports on the back. If you deselect the wireless option this in fact 'turns off' the wireless capability.
You can in theory use any router you like but you will be breaking your T's + C's if you do and Sky can terminate your contract if you get found out.