As I am sure you are all aware it can be difficult to find a GP who is helpful with transitioning within the UK. Earlier this year a parliamentary committee released a damning statement that the NHS is "failing" Trans patients. It has just been announced that the promised reforms have been delayed, I am hopeful the government is just being cautious to make sure they get things right.
A group of Trans people have started a searchable database to help people to both find & rate GP's on their willingness/ability to deal with a persons transition.
They are having a few teething problems such as installing links to facebook but the database is up & running & gradually building up information to help us all.
I did a quick search for my area, the site was easy to use & already had ratings for several local GP's.
One small feature that I liked was a big button next to the header to instantly return you to your search engine, this is a great feature for those who are not yet out.
I hope this helps in some way
http://transfigurations.org.uk/trans-friendly-doctors/