I'm a bit confused as to how you will negate the JAA Class 1 med. by going to the US and coming back here to convert it, they will just make you take a full JAA class 1 initial won't they?
From what you've written, it seems you're implying because you have the FAA CPL-ME/IR, class 1 etc, they don't do the JAA medical as an initial back at Gatwick, is that correct?