The Jetstream 31 cannot accomodate an Ambulift by way of access door / steps design. When I flew this aircraft (not with Highland Airways), wheelchair passengers were unfortunately denied travel. This was always made clear at the time of booking. Before anyone jumps on the wagon of discrimination, the policy was accepted by the CAA and airports from which we operated.
Too often we see passengers booked on flights who do not declare pertinent disabilities prior to checking in. I once gave in to a paralysed passenger who politely insisted on being allowed travel on a J31 flight. Despite the crew's best efforts to assist the gentleman on board, the narrow rear galley precluded this and he had to crawl unassisted from the step along to his seat. On this occasion I broke several rules and left myself wide open to prosecution should we have had to evacuate. In hindsight I would now stand firm in denying travel for this very reason.