Salute!
Back in the day, the Aussies and U.S. flew with each other as FAC and attack folks to get oriented and perfect our procedures. And I thik we even had Canadian Carabou folks in the fray, but gotta check.
The Blackbird was a quantum leap ahead of the U-2, and I could understand more "special access". However, I thot I saw a referrence or two about some RAF invites to Have Blue results and initial 117's....Dreamland Resort could have some stuff.
Gums sends...