This web site seems very useful: http://www.the-scream.co.uk/forums/f4.html

It's a forum which discusses ISP's, broadband problems, etc. It has a 
section for Virgin Net. It's free but if you want to post then you have 
to register (which is free and not a problem).

I have no connection with it apart from having registered and posted as 
a normal member.

John