Arthur Fowler

Arthur Fowler was a resident of Albert Square in the East End of London and the husband of Pauline Fowler. In 1973, Pauline told Kathy Beale where she was when Kennedy was assassinated, but jokingly told her not to tell Arthur. He was dead by 2013. (NOTVALID: Dimensions in Time)

Behind the scenes
Arthur Fowler was a character on EastEnders. He was mentioned in Dimensions in Time as it was a crossover special with Doctor Who.

Arthur had indeed died by 2013 in EastEnders' own continuity, having been killed off in 1996. Unlike in Dimensions in Time, Pauline had also died by then.