Or nappies, before anybody makes the "because they're not called diapers" joke.
I have a brilliant opportunity tomorrow to go and get some and get them home without people noticing, but the only thing I'm pretty certain of getting that will fit is drynites. You only get adult sized things in big supermarkets or boots stores and what you can get, by all accounts, tends to be on the awful side.
As for ordering something, I live with parents who don't go out often. It is an impossibility.
I'd be interested to know any brits who regularly manage to get proper adult diapers and how. Or any help in general for getting them in the UK.