The War Illustrated, Volume 3, No. 54, Page 253, September 13, 1940.

Determined as always to see for himself, the Prime Minister has visited many of Britain's coast defences. On August 28 he was at Dover when Nazi 'planes renewed their attack on the town and there was a fierce aerial fight overhead. Mr Churchill, wearing a steel helmet, mounted to a vantage point and watched the progress of the battle with keen appreciation of the skill and daring of the British fighters. Photo, British Official; Crown Copyright.