I cannot see how to register a new device for Sky Sports. I have already registered it on the Virgin TV Go app. I've tried to follow links on the Virgin Media website but it seems to send you round in circles.
Finally managed to work it out. The instructions were correct on the Virgin website about going to the Virgin TV Go website but unfortunately the embedded link they provided wasn't right. I googled the link to the Virgin TV Go website and then once I was logged in, was able to see the manage my Sky devices option.