You know for sure there’s a war on when you’re at the football and an air raid warden is scanning the sky for any sign of the Luftwaffe! This photo, possibly, shows a game between West Ham and Chelsea from 1940 but happy to be corrected if anyone knows any different.
Edit: Confirmed, the game was West Ham v Chelsea played on 7th December 1940 at Upton Park. The Hammers ran out 6-2 winners in front of 1000 spectators. Thanks to chrisredditch and South Bank over at the Football Ground Guide Message Board.