The Stranraer was the final development of the Southampton and one the last biplane flying boats to be produced. The type served much longer with the RCAF than with the RAF. This example was built in 1940 and patrolled the Canadian coastline until 1944, when she was demobbed and registered CF-BXO. In 1947 she was acquired by Queen Charlotte Airlines, renamed 'Alaska Queen' and based in Vancouver until retirement in 1952.