Checked my line as recommended on another thread & report said:- "However, there is another service on your phone line (e.g. ADSL, LLU, DACS, etc) that would prevent you from ordering a new ADSL connection."
Any info on what it all means. I have heard the "DACS" somewhere before.
Normally if you have a DACS line you can't get Broadband which requires a dedicated ( one user) line. As you state that you have O2 BB you aren't on a DACS line but your line is unbundled. If you are on an unbundled line this uses the ISPs own dedicated eqipment at the exchange. When you run an availability check for another provider it recognises that you are on an unbundled connection and they cannot provide a service while it is connected to the O2 equipment which is why you get the message.