"Office workers on their lunch break sat in striped deckchairs on the grass of Green Park where they threw bread to scraggy ducks. London still functioned."
Dig For Victory (poster)
Public DomainDig For Victory (poster) - Credit: Imperial War Museum, London

London still functioned, but it was a very different place in wartime.  German bombs had destroyed two million homes, every window was blacked out, food was scarce, lawns had been dug up for vegetables, many of the men were enlisted, most of the children had been sent to live with strangers in the countryside, and those office workers probably each had a gas mask beside their deckchairs.