The 72 Sqn bloke mentioned first approached the RAF via the Consulate in Canada.
He had to do the 8 week SERE Cse, not too difficult as long as you can prove you have a pulse. Post Grad at Cranditz, it was a refresher at Shawbury, then straight to OCU. One advantage he did have was that he did part of his advanced flying training in the UK on exchange, I believe.
From what I recall, I don't think he had too many problems transferring. Good luck!
UVG