Battle of Britain. Low cloud and rain keep most aircraft grounded. German bombers attack industrial and dock areas along the Scottish coast but do little damage and Westland Aircraft aircraft works at Yeovil, Somerset is bombed (1 runway and 1 hangar are damaged. Convoy "Pilot" is spotted by a reconnaissance aircraft in the Thames Estuary but Dornier bombers sent out to attack are headed off by British fighters.
140 British commandos are taken to Guernsey by destroyers HMS Scimitar and Saladin but Operation Ambassador goes badly. 40 men from No.3 Commando are ferried ashore in launches but find German barracks empty and re-embark leaving behind 3 men who cannot swim back to the launches. They become German POWs. Other launches crash on rocks or go to the wrong island, Sark.
At 3.21 AM, U-34 sinks Greek steamer Evdoxia 40 miles southwest of Ireland (1 dead, 22 survivors). http://www.uboat.net/allies/merchants/ships/424.html
Estonian steamer Merisaar, captured by U-99 on July 12, is sunk by German bombing off Cobh, County Cork, Ireland. The German prize crew is rescued and taken prisoner.