The initial JAA Class 1 was EUR170 this January in Prague. VAT on services is 5%.
You get it right there and then.
If you take a copy of the full medical report on the day, and get a form from the UK CAA printed out before and filled in by the Czech AME, they will give you a CAA UK JAR medical for it, which you need for licence issue in the UK.
Please find their contacts on google, some of them speak good English, all of them fly. Oh, and enjoy Prague!
cheers, IP