From the FAQ on that page
Quote:These changes may affect customers that currently have a line billed by BT, but who make their calls through a different provider. Customers who do this can dial 1280 to make calls that are billed by BT. On the new service, a call pre-fixed with 1280 will connect in the normal way, but it will NOT be chargeable to a BT bill. It will actually be charged by your own Call Provider (and this could be at a higher rate). It will also NOT count towards the necessary calls quota to receive either BT Caller Display1 or BT Answer 15712 at no extra cost.
and
Quote:How will I know if my Call Provider is making these changes?
A number of Call Providers are making these changes. Some of these, such as Sky, have made this information public. However, other Call Providers have chosen not to do so, and the information remains commercially confidential.
So, if you usualy use 1280 to force a call via BT, not only could you suddenly be charged more for the call, but you won't even know about it until your bills come in because providers aren't telling you! Nasty.
I imagine this just affects people who use CPS (carrier pre-selection) i.e. you don't have to dial a prefix to use the alternate carrier. If you dial a prefix or use an add-on box to do it, I can't see how it would affect you, as you don't need to use 1280 to force a call to BT.
I wonder if it means they are barring access to ALL other carriers ?