Americans in the RAF in 1940

[Alex Smart]

Hello Bill,
But all these men or women would not be in an operational status as flying crew, ground crew etc etc in the UK during the BoB or before. They would surely still be in Canada undergoing training and such. Only a very few that had for one reason or other joined the RAF from before 1939/40 would be in that situation ?
And
From "American Eagles" by Tony Holmes.
"To enlist in a forign countries military was illegal from 1939. It was also unlawful to use a US passport to secure passage to a foreign country for the purposes of enlistment."
Maybe this is why at the later time (mentioned in an earlier post) some were stripped of their US citizenship and others were not due to the time they enlisted.

John, how about a link ?

All for now
Alex