Don't know if this is the right category, but I contacted O2 saying that I was going to switch to another provider (and I was indeed) and they asked me which one. I said Virgin because I had a good offer from them.
Shortly after they offered me broadband for FREE for a year as long as I switched my phone line from BT to O2.
As I don't use the home phone at all - except for the broadband - I didn't need any call packages, so I accepted it.
In the end I am paying £7.50 a month for home phone and broadband which makes an excellent deal.
£90 for a year