dumsruck,
As a new poster here, perhaps you should bear in mind that (probably fortunately) the NHS has little or nothing to do with running air ambulance (HEMS) operations. They are paid for in England and Wales by charities. Usually, the "operator" is an experienced helicopter company. The NHS provides the paramedics and the requests for tasking.
Do you want to provide any more detail?
Last edited by Helinut; 20th Jul 2012 at 13:34.