Hi Hoistop
My former associates will roll their eyes in boredom at me ranting on about this again; however, your use of
and air ambulance (i.e. interhospital transfer)
will tend to continue the misconception that taking a patient from one hospital to another cannot be carried out under HEMS. I suspect I will be fully retired by the time this misconception is finally put to bed but I keep trying - as you suggest later in your post, the HEMS requirement is based upon medical urgency not where the patient is being taken from/to.
Cheers
TeeS