Movadinkampa747, thanks for your reply. However, the first chap you linked to, the Civil Eng, was listed as being a Pilot trainee at Cranwell, and the other just said Pilot Officer, so could be any trade.
Who's afraid, I'm studying Mechanical at the moment.
Is there a definitive publication, perhaps one that I could get hold of through the UAS, that outlines the services requirements?