Martin Fowler

Martin Fowler was the son of Pauline Fowler.

By one account, both he and his mother were fictional characters on the television series, EastEnders. Within the show's universe, he was living with his mother and Sonia at 45 Albert Square by 2006. (PROSE: The Monsters Inside)

According to another account, he and his mother really existed. In 2013, his mother complained that he wasn't there to mind the fruit and veg stool when a boy stole an orange. (TV: Dimensions in Time)

Other references
When tested by Lazlee Flowers on tangential warp offset, the Ninth Doctor reminded Rose Tyler of the address of Martin, Pauline and Sonia Fowler, leading her to give the answer 45. (PROSE: The Monsters Inside)