managers from london ambulance service , the largest in the nhs , have just filled 225 vacant posts with applicants from sydney and melbourne .
they were recruited on the back of a series of practical demonstrations on dummies , a written exam and an interview that lasted in all between four and six hours .
ambulance bosses are routinely making a 21,500-mile round trip to australia to hire paramedics on £ 4,500 ` golden hello ' payments .