theroyalhistory:

Elizabeth Douglas-Scott-Montagu (later Varley; daughter of the 2nd Baron Montagu of Beaulieu, sister of the 3rd Baron Montagu of Beaulieu); actress, author, war worker (ambulance driver and translator), and friend of Orson Welles and Graham Greene; modelling a wedding gown, 1934

From Wikipedia:

She travelled extensively throughout Europe in 1935–39, and also studied at a piano school in Switzerland. When asked about her racial background while applying for a visa at the German consulate in St. Gallen, she angrily swept items – including a portrait of Hitler – from the desktop onto the floor. Her passport was confiscated.

While working at the Political Intelligence Department at the British Embassy in Berne, she translated material from within Germany, including information on what was happening at Treblinka extermination camp.