In support of the above...
I can only speak 100% for the ambulance service but think the others are pretty much the same...
Solo, (the Toyota 4x4) and sometimes dependent on the crew an ambulance can 'free range' ie use the the taxiways as well as the airside roads. There is a limited number of ambulance staff with airside driving permits, about 14 currently of which 9 can free range. If a non airside driver/crew are manning the ambulance then it must be escorted hence the police or sometimes an airfield ops vehicle.
Initially we are trained by the police for 'Roads Only' and then progress to Free Range after some airside experience and further training then a oral/pratical knowledge exam from Airfield Ops.
As I say I think the police and fire operate the same system as they do our initial and refresher training.
And yes all aircraft have the right of way! After all you can't trust these pilot types, (not that there are many helio pilots at LGW these days!)
And thanks Muppit - we appreciate your asistance. But wont comment on your last paragraph in case I fail my recertification!!!
