Waterton Street was a street in London.
Rita-Anne Smith lived at 1 Waterton Street. In Mickey Smith's universe, she had tripped down the stairs and died. In another universe, she still lived there in 2007. (TV: Rise of the Cybermen) Mickey stayed behind in the alternate universe, and lived with his grandmother, but they moved to Peter Tyler's mansion. (TV: The Age of Steel, Journey's End)