It seems that Friends Reunited is the top social networking site in the U.K. right now. From friends reunited you can find old school mates, find lost relatives or find people you used to work with. You may even be able to find a date.

When you sign up just list the places you've been to school, then search for other's who went to your same school. When looking for relatives sign up for the Genes Reunited family tree. Here you can build your family tree and search to see if anyone else on your family tree is already on Friends Reunited.