altocu
I don't know that you have to have a class 1 medical when you sit the exam however you will need one at some point (obviously). The only catch is that you will need a CAA (or whichever authority) reference number - and getting your medical is the standard way of acheiving this (in the UK at least). This may make it difficult to achieve the whole medical/exams shooting match in one short trip so perhaps there is another method which would be better.
UTR.
PS I'm sure WAAC were advertising modular courses in the not too distant past - obviously not the market around for them? Or too many $$$ to be made on the integrated courses.