You can register to a GP and NHS in a Fiancee Visa. I did that a week after I got here. They will give you a form to fill up in the surgery of your choice. Just bring your passport, birth certificate and any other identification you have. It seems that different surgeries ask for different stuffs so better be prepared. Go to this site for further info http://www.nhs.uk/chq/Pages/1095.asp...CategoryID=158