Wikipedia describes two systems in the UK: https://en.wikipedia.org/wiki/House_numbering#United_Kingdom https://en.wikipedia.org/wiki/House_numbering#United_Kin

Wikipedia describes two systems in the UK: https://en.wikipedia.org/wiki/House_numbering#United_Kingdom https://en.wikipedia.org/wiki/House_numbering#United_Kingdom According to both those systems, if you look down the street from the end where number 1 is (which is always the open end of a cul-de-sac), then number 1 is the first house on your left. I'd be interested to hear about any exceptional cases in which number one is on your right.