I have a cousin in the UK and was wondering if he is able to access this site. I tried to search stackexchange UK, but didn't find a UK site. Is SE, specifically Math.SE, for US users only or is it one site for all countries?
Here's a proof that UK users are welcome: http://maths.stackexchange.com directs here.
Well, there is a short entrance quiz for UK users:
(1) What is the name of the new royal baby?
(2) What country is Andy Murray from? I mean, really?
(3) What happened recently in a McDonald's near Manchester?
(4) How does that relate to Albuquerque, New Mexico?
The site is for everyone, everywhere, granted they are being friendly, and keep their posts within the topic of the site (mathematics).