World War II deliveries.
As in peace time, aircraft needed to be delivered from one place to another. Contrary to peace time, the aircraft would remain the property of its original owner, in this case, the Royal Air Force.
Important to note that not all aircraft had Malta as their final destination. Some would land for re-fueling, before continuing with their journey, usually for Egypt.
Occasionally, the ferry flight would be in the opposite direction, i.e. Egypt to Malta.