I am afraid this doctor v paramedic is irrelevant
At night many services have a precare practitioner - often a consultant anaesthetist, not an A and E trainee. The helicopter doesnt alter this and indeed as many PCPs are on call from home the helicopter may have only a paramedic as there are no 'spare' trainees - their numbers are fixed. There is no time saving at the hospital either.
But this is not the point. The quality of medical care will not change by putting rotors on the vehicle. The issue is £300 goes to £1500 for no identified medical benefit.