Madresfield Court, near Malvern, Worcestershire, where the Royal Family would have been evacuated to if the Nazis had invaded.
Read the whole article at the ‘source’ link; I will only quote one passage.
The earl’s wife decamped to her brother’s estate in Cheshire after discovering what she, in her innocence, termed his “buglery”, leaving Madresfield – known in the family as “Mad” – in the hands of the Lygon children. House party followed house party. Waugh, the middle-class writer from Golders Green with a fascination for the aristocracy, drank it all in. Boom was the inspiration for his Lord Marchmain, and Hugh Lygon, the doomed second son and most likely a lover of Waugh’s at Oxford, was reinvented as Sebastian Flyte. A drunk, he died in 1936 after hitting his head on the pavement during a motoring tour of Bavaria.
According to Ken Davis, who delivered groceries to Madresfield before the war, there was no great liking for the Lygons locally.
“That was nobody’s business what was going on down there. The earl carried on with local men. He met them when he was hunting.”