Dot Cotton

Dot Cotton was a person who appeared in the British soap opera EastEnders. Clara Oswald described her as a "famous Cockney chimney". (PROSE: The Blood Cell)

Biography
Dot met the Twelfth Doctor at a dinner party with Sprout Boy. (TV: Sprout Boy meets a Galaxy of Stars)

Information from invalid sources
While the Eleventh Doctor was trying to drop off Dermot O'Leary at the National Television Awards, Dermot stepped out of the TARDIS into Albert Square where he was met by Dot. He was shocked to find that she knew the Doctor. Dot explained to him that he was never out of her laundrette. (NOTVALID: Dermot and the Doctor)