At 04:16 six Bostons attacked German coastal artillery in the twilight which led to the results not being observed. Soon afterwards 14 Bostons flew to Dieppe to drop smoke bombs around the German guns on the eastern heights, bombing the batteries between 05:09 and 05:44 with a hundred and fifty smoke bombs at , flying through a storm of anti-aircraft fire. A smoke screen drifted seawards, thickened by the smoke of a burning field of wheat. Six Bristol Blenheim bombers from 13 Squadron and one from 614 Squadron dropped phosphorus bombs south of German sites. Nine of the twelve Bostons were damaged, two crashed on landing and one Blenheim smoke layer from 614 Squadron was damaged and the pilot wounded, the aircraft crashing on landing and bursting into flames. Just before 08:00 two squadrons of cannon-armed Hurricanes were ordered to attack E-boats coming from Boulogne; they were accompanied by two fighter cover squadrons.