Why do some channels go topless at 9:30 and others at 10?

I think the 'no topless before 10pm' is a guideline more than a rule. I think the channels don't want to upset OFCOM and so don't let the girls go topless too near to the 9pm watershed.
I have noticed that certain girls on Babestation have been getting topless at about 9.50/9.55 but Amanda tonight, at about 9.40, is the earliest I've seen. I don't watch many of the other channels, so not sure what time they go topless.

There's an older thread here that discusses this. The forum admin posted some info to the same effect as cdm79's post.

http://www.babeshows.co.uk/showthread.ph...#pid132374