I have to go observing with the ambulance service as part of my course. Whilst working in MAU and A&E as a health care assistant I was also allowed a coupple of shift a year out with the ambulance service. On a coupple of occasions we have transported patients in the cars (we have bigger cars than london which have five seats) I can sit in the back with granny who's broken her wrist/arm without any problems and we dont tie up two more people from a crew. HOWEVER apparently their insurance doesnt cover them! so its full ambo or nothing.