[joeysteele]

British Gas are notoriously inconsiderate, True people do work at 8.50 am but that is not so with everyone, people who work nightshifts for example just getting in at 8am and going to bed, then getting this bang at the door at around 9am. would be massively annoying.

Its very easy these days to ring people and say the readers will be in the area on such and such a day so you could arrange to be thereIf a British Gas customer you usually give a number to reach you on when you sign up) but to just call at 8.50 am is a bit off.
If you had young children for example, you could be seeing them to school at that time too.