The nearest place to the UK to do the written exam is at Flight Safety in Le Bourget, Paris. There is no-one in the UK. The guy at Norwich is being prosecuted by the DTF for illegal activities at the moment.
I have just done it so I know.
The Flight test will probably have to be done in the States because there is an issue again with the UK government and it is hard to get examiners to come over. I am doing mine in Dubai with my type rating in the sim.
You will have top go through the TSA procedure and it takes time. Use the website
https://www.flightschoolcandidates.gov/
You need to be enrolled at a school first to start the process.
You will probably be a Class 4 applicant which means you may not have to do fingerprinting, it is all explained on the site. Also any questions to
[email protected].
I also highly recommend the Gleim CD with about 1 month intense study.
Good luck