This is a brilliant site. http://www.woodlands-junior.kent.sch.uk/customs/index.html
It was put together by a bunch of kids and their school teachers for the first time visitor to the UK. It contains much valuable information like not to pick your nose or break wind in public along with info about the weather, Royalty, transport, the place of women in society, where to go what to do etc etc.
It quite made me giggle.