Sounds like yet more bullsh1t from the Min of Def. I'm damn sure that U.S. Exchange personnel were forbidden by their government to take part in the Falklands campaign, I see no reason why the same shouldn't have been applied to "embedded" servicemen with US/Canadian forces, without seeking parliamentary approval. But then, like everything in parliament these days, breaking the law is simply a matter of "individual interpretation" ! I hope the lads on exchange perform well, and give a good impression of Britain to our allies, it's a shame that these ever willing servicemen are let down by the buffoons who serve in our parliament.
Smudge