Apologies, Heinz, if you took offence to my comment about working for BT. I was intended to be a joke.
My "understanding" of the allocation of access codes might be a little wide of the mark, but I never said that BT allocated them and I am informed enough to know that satelitte TV does not = BSKYB (yet

).
Having read your post, it would make perfect sense for such codes to be administered and allocated by a regulator. I'll do some homework to find out if this is the case.
It still doesn't help my plight when the phones ringing at 3.00 in the morning.
Should the volume of calls get any wosre, I'll have no option but to contact Talk Talk. The reason for the thread was to find out if anyone had a similar problem.
My phone service is with BT so it makes perfect sense that any complaint with the service should start there. Is it really unreasonable to expect to only receive calls from people I know?