Albert Kesselring knew that the British were used to large raids every few hours by this time, so he changed tactics by dispatching smaller raids every 20 to 30 minutes. The airfield at Biggin Hill in England, United Kingdom was attacked repeatedly, but for the most part bombs fell on the town instead of the airfield, killing 39 and wounding 26; nevertheless, the few bombs that hit the airfield did damage the operations room and briefly brought down defense coordination at this site. Other targets attacked by German bombers on this day include Dietling (placed out of commission for remainder of day), Debden, North Weald, Duxford, Eastchurch, Croydon, and Hornchurch. The Ken radars were also brought offline briefly as power lines were damaged. This day, with 1,310 sorties flown by the Luftwaffe, would become RAF Fighter Command's day of greatest casualties, with 40 aircraft destroyed, 9 people killed, and 18 people seriously injured. German losses were great as well: 33 fighters and 30 bombers. Heavy attacks continued in England after nightfall, with Liverpool, London, Portsmouth, Manchester, Worcester, and Bristol bombed.
