Simon Glancey has submitted the following:
Sgt. Donkin was killed in Curtiss P-40 Kittyhawk Ia AK652 GA-D of 112 Squadron, which was lost on a mission escorting Blenheim bombers sent to bomb Derna. It is thought he may have been shot down by the Luftwaffe ace Hans-Joachim Marseille of JG27 at 14.30.
Shark Squadron: The History of 112 Squadron, 1917-1975, R. Brown, 1994, Crecy Publishing, ISBN 978-0947554330, page 56.
Sgt. Donkin was from the family of bakers in the town.
He is remembered in Ashington on A17.43, at Hirst on H62.02 and at Morpeth on M17.06, M17.07 and M17.12