Over Britain... The Germans maintain their concentrated attacks on the British airfields. Biggin Hill is almost put out of action and Debden and Hornchurch are severely hit. The RAF loses 39 aircraft in the air and several more are hit on the ground. The Luftwaffe losses are 41. Goring is now in measurable distance of achieving his objective of air superiority over southeast England. The RAF airfields at Biggin Hill, Manston, West Malling, Lympne and Hawkinge are all more or less out of the fight. There are only two RAF sector stations in commission south of the Thames and three more airfields which might be used for that role. There is no reason why these might not be similarly damaged, three having already been hit. This is the RAF's most difficult period of the battle.