Ah yes.
Initial FAA Class 1 took me an hour in London with an FAA approved Doc as I recall.... elderly Doctor gave me the once over, queried "if everything was OK down there" (I nodded and he didn't look!) and bobs your uncle, slip produced. CAA don't get me started, don't want to swear. One advantage of the CAA medical though is it is pretty thorough.
So "Class 1" is meaningless anyhow as standards vary hugely!