Just came across this:
http://www.ispreview.co.uk/news/EkkkpZpuEkBaCtpuEr.html
Sounds as if the voice and line rental may be similar to the iDNet offering.
[Edit] I should add that this may be dependent on WBC being available, workable, etc etc....
It sounds like a very similar business model, Tac.
This seems to be the way that a lot of ISPs are going now.
I suppose, as market saturation approaches, it's inevitable, Seb.