Upstairs, Nazi generals enjoyed wine and lounged in elegant rooms. Downstairs in the basement, a team of covert listeners followed their chatter, gleaning vital insights into Germany’s war plans. During World War II, Trent Park, a country house north of London, was turned into a camp for high-ranking German prisoners of war. Now it has become a museum called Trent Park House of Secrets, which highlights the role of the team of German speakers, most of them Jewish refugees, who transcribed titbits from the prisoners’ bugged…
