You can do it in the uk, but you need to be extremely careful. In my last job there was a curtain between the cabin and the galley, and a forward toilet. As far as the other passengers were concerned a young boy (2 and a half) was taken to the toilet by his grandfather. I had my son and father in the flight deck which I'll probably never be able to do again in flight. I was working my notice but the DfT could have prosecuted me if some nosy passenger had poked a video camera past a curtain or something. We're all so paranoid these days...