"Can't help feeling that we in the UK are far too hung up on all aspects of nudity"

Oh, yah? I betcha our American hangups over nudity are bigger than your hangups over nudity any day! : )

I can't cite anything substantive on this right now, but I've seen alleged results of studies over the years to the effect that educational and professional levels are generally higher among members of nudist organizations than the general populace. Personal experience for me would say that's true to a limited degree. I would just think it would follow with the general tendency of non-rational taboos, biasis, and traditions to fall away with education.