Unity Mitford summered at the Berghof where she continued to discuss a possible German-British alliance with Hitler, going so far as to supply lists of potential supporters and enemies. At the 1939 Bayreuth Festival, Hitler warned Unity and her sister Diana that war with Britain was inevitable within weeks and they should return home. Diana returned to England, while Unity chose to remain in Germany, though her family sent pleas for her to come home. After Britain's declaration of war on Germany on 3 September 1939, Unity was distraught. Diana Mitford told an interviewer in 1999: "She told me that if there
Diana Mitford relationships with her sisters. Initially, Jessica and Deborah were not permitted to see Diana as she was "living in sin" with Mosley in London. Deborah eventually got to know Mosley and ended up liking him very much. Jessica despised Mosley's beliefs and became permanently estranged from Diana after the late 1930s. Pam and her husband Derek Jackson got along well with Mosley. Nancy never liked Mosley and, like Jessica, despised his political beliefs, but was able to learn to tolerate him for the sake of her relationship with Diana. Nancy wrote the novel "Wigs on the Green", which satirised Mosley