They'll curse much more. I caught a string of Kitchen Nightmares on BBCA last week (it is even better than the already addictive US version). Ramsey manages to curse twice as often while getting censored half as much.
He had a classic cameo in the finale of "Extras" on HBO, where he had a slanging match with Andy Millman. Of course, it being HBO, there was no censorship.
I wouldn't be surprised if, on the BBC proper, Ramsey goes out uncensored too. The old rule was that everything before 9pm was G-rated, but afterwards anything goes and you let your kids watch at your peril. Monty Python, for example, pioneered what became the classic 9pm Friday night time-slot on BBC2 for alternative comedy. They also used to show R-rated movies uncut after 9pm, but have since moved to showing the edited-for-US-TV version, which is
fucking shit foggy stuff.