Mrs Woodcott was a human psychic living on Earth around the turn of the 21st century.
Justine Wheaton had a hallucinatory conversation with Mrs Woodcott while being drugged. (PROSE: Cat's Cradle: Warhead)
Years later, the Seventh Doctor tracked her down to find out more about warlock, since she was considered Earth's foremost expert on it. (PROSE: Warlock)
Some time after that, she was using her psychic powers to aid the British government. She had Roz Forrester, Redmond and Creed McIlveen press-ganged into helping deal with the growing threat of dogs randomly attacking and killing people. (PROSE: Warchild)