S/L Dunnicliffe (left, and below with his crew in March 1944) was the acting Commanding Officer on the night of Black Thursday, 16-17 December 1943.
He had only taken over from Group Captain N H Fresson on 15th December when Fresson was posted to RAF Snaith. Dunnicliffe was well-liked and a very capable officer, but his was only a temporary caretaking appointment - Wing Commander E J Carter would succeed him as CO three weeks later, on 7th January 1944.