12 Sqn took part in 3 operations during this week, to Wilhelmshaven, Milan and Lorient. Two of these missions were interesting as the Wilhelmshaven raid was the first successfully marked by the Pathfinders using sky-marking (usually the most unsuccessful method) through complete cloud cover using H2S. Lorient was the first where 1000 tons of bombs were dropped on a target by Bomber Command.
Also this week, carrier pigeons were carried for the first time by 12 Sqn, 2 per aircraft. They were kept in a loft at RAF Binbrook and were to be used if the aircraft had a forced landing outside the UK.
One aircraft was lost this week, with all the crew being killed.