17 July 1940
No.615 Squadron returns to Kenley at 13:30. However, Squadron Leader Joseph R. Kayll (P3109) and Pilot Officer Petrus H. Hugo (P2963) must take off on alert (11:45 – 12:30) to intercept an intruder between Kenley and Beachy Head.
This one turns out to be a Dornier Do.17, which is attacked by Pilot Officer Petrus H. Hugo, albeit unsuccessfully. It could be a Dornier Do.17Z from Stab KG 2, which lands on the Saint-Inglevert airfield with various damages in air combat.
This event would also have caused the Spitfire Mk I L1065 of No.64 (RAF) Squadron to take off between 11:49 and 12:35. Sub-Lieutenant John Sykes would also have damaged a Dornier Do.17 in the vicinity of Kenley  Here again, the opposing aircraft escaped in the cloud cover.
At the same time, Pilot Officer David J. Looker, who is still recovering, is in charge of setting up a training course for the many new pilots who have joined the various squadrons based in Kenley.
 No.11 (Fighter) Group ORB. Kew : The National Archives, AIR 25/193.
 PARRY, SIMON W. Battle of Britain Combat Archive, n°1 (10 July – 22 July 1940). Red Kite. 2015. p.76.
 No.64 (RAF) Squadron, Operations Record Book. Kew : The National Archives, AIR 27/589.
 CULL, Brian. Battle for the Channel: The First Month of the Battle of Britain 10 July – 10 August 1940. Fonthill, 2017.