@oldwheels
One of those long wheelbase campervans brought the ambulance drop off point to a standstill (and the rest of the flow of traffic throughout the parking area) at the Hospital I attended regulary.
The driver of the campervan obviously thought he was entitled to park in a designated ambulance slot. Inevitably one ambulance arrived and could not find a parking place, and left his vehicle in the middle, where traffic normally flows through. Fortunately this was not the emergency ambulance entrance.
I do not blame the ambulance driver, he was possibly trying to make a point, as he parked level with the campervan. The patient was in a wheelchair and it takes some time to lower them on the "lift" (?) and take them into the hospital.
After that incident I contacted PALS (patient liason) to tell them what happened. Apparently the Wardens of the car park do not have authority to order someone to move their vehicle, and the Police do not have the authority, as it is private property. Alledgedly the campervan stayed there for a few days.