Wallis Simpson

 was the divorced American mistress and later the wife of the former King Edward VIII of the United Kingdom.

In November 1936, Lady Louisa Pollard referred to her contemptuously as "that dreadful Simpson woman." (AUDIO: The Fall of the House of Pollard) The Seventh Doctor warned Winston Churchill that Simpson was a shapeshifter from Verrosikon Prime, and advised against supporting her marriage to the King. (PROSE: The Lost Diaries of Winston Spencer Churchill)

In December 1936, (PROSE: Wolfsbane) she met the Sixth Doctor and Peri Brown, with Winston Churchill expressing his concerns about her close relationship with Joachim von Ribbentrop, the German Ambassador. She was part of a plan by the Count and Countess to capture Peri, the Players having claimed to von Ribbentrop that she was an agent of the United States Secret Service, but Peri escaped thanks to the aid of Tom Dekker. Edward abdicated the British throne to marry her (PROSE: Players) on 10 December of that year. (PROSE: Wolfsbane)

In an alternative timeline in which Nazi Germany won World War II, Edward VIII was restored to the throne with Wallis as his Queen in 1940. He signed a treaty which established Great Britain as a protectorate of the Greater German Reich. (PROSE: Timewyrm: Exodus)

Behind the scenes

 * The idea that Wallis Simpson is an alien shapeshifter comes only from a brief extract from The Lost Diaries of Winston Spencer Churchill, a short story in The Brilliant Book 2011. Nevertheless, it is given some credence by the 2020 audio story Subterfuge, which acknowledges that the Seventh Doctor and Churchill did meet up during the abdication crisis, referred to as "that business with Mrs Simpson."