Alternate timeline (Timewyrm: Exodus)
From Tardis Wiki, the free Doctor Who reference
An alternate timeline was created by the interference of the War Chief in early 20th century Germany. The Nazis won World War II and took over the United Kingdom. Oswald Mosley, who had been imprisoned in 1940 as a a Nazi sympathasiser, was released and made the Prime Minister of the United Kingdom. (PROSE: Timewyrm: Exodus)