Ok so I think there must be at least one other country that has this but when I realise how recently installed some of the taps can be that infuriates me. Like my Gran's house is 30 years old and it has double taps, and I'll see it in recently renovated toilets in cinemas or restaurants. I'm sure there's some 200 year old tale like for everything else but why would anyone choose it over a single tap? </rant>