This is strange as I have at least one client who was sold multi IP addresses for his network over an 8m ADSL service which only provided 5m.
Could this be linked with Fibre promoted as a multi-user service?
Becase fibre is really 15 mb, even if you can reach the DSLAM from your office window, we're recommending clients stick with DSL until the contract terms state you get service for what the line supports. Right now when desperate housewifes are surfing "findmeatoyboy.com" fibre becomes more like "desperate broadband!".
But joking aside; are BT changing the terms for ADSL? Is it now a single user service?
Just because your paranoid doesn't mean they're not out to stiff you.