faa and caa medicals are totally seperate. Flying in the US has nothing to do with your caa medical. All you need to do is pass the FAA class 3 medical to fly solo in the US and it is a very lax medical compared to the CAA class 1 so you should have no problem, deviation or not! Flying with oxford you will only need the UK CAA class 1 medical at the very end of the course for licence issue, as in the US you will be flying on your US FAA class 3. Goodyear is good fun