Thanks to this thread I've just been on the phone with a lovely Scottish lady who was really helpful
I'm in Poole, area reference 20, I didn't get my switch number, but she looked up on the computer (I could hear her typing away) and said it wasn't in my area yet, but noted that it should be available in the next few weeks. She was aware of and up to date with the fact they were rolling it out.
So fingers crossed in the next couple of months I'll finally have it after waiting nearly 10 years LOL!