@Bill:
Well, I don't know that there is an official directive to that effect,
Perhaps because it would be commercial suicide if there was one?
but since every single operator I spoke to was trying to persuade me that I was wrong and BT were right, despite the fact that provided all the evidence to back me up and apparently conviced each operator in turn (after 15-20 minutes of debate each time), what else can I assume?
Various things? Incompetence on the part of the operators springs to mind. Saying staff, in general, are told to behave this way is a rather sweeping accusation that, if made against a firm in the amiga marketplace - with the same lack of proof, would be condemned as FUD and rightly so. You didn't mention that it was only your opinion, based on personal experience or not.
Incompetence is one thing. A company policy of deliberately pissing off your customers is quite another.