Commemorated by Eric, Operation Neptune (often referred to as D-Day) was the codename for the Allies' invasion of Nazi-occupied France on Tuesday 6th June 1944.
Rather than being "only about 13" on D-Day, Eric was actually 18.
"Sid and Dick used to write stuff like that, you know," says Eric wryly. Their previous writers, Sidney Green and Richard Hills, had just left them to sign an exclusive writing contract for Lew Grade's ATV.
The first appearance of the Eric and Ernie bedroom sketch.