Zoom,
Sorry, to what a/c are you referring?
As a further explanation, in writing several articles on various a/c, both British and American, I've interviewed gents who flew for the other side (US in Bucc, Lightning, Jaguar, SHAR on the eastern side of the Atlantic; UK in F-4, C-130 and KC-135 on my side of the water). As was mentioned I also know of RAF types who flew our U-2 (including carrier qualification!), and F-117.
From what PN wrote, seems as if the ones that carried the biggest 'bangs' were limited to natives only. I would assume the same for our B-47/52, etc, but don't know that. Just curious about some of the many other types that have gone aloft since WWII.