Kathy Nightingale

Katherine "Kathy" Nightingale was the sister of Larry Nightingale and a friend of Sally Sparrow. In 2007, she visited Wester Drumlins with Sally. There she was sent back in time to Hull on 5 December 1920 by one of the Weeping Angels. Stranded, she started a new life, marrying Ben Wainwright and having children including a daughter, also named Sally.

In 1969, the Tenth Doctor, working from information given to him by Sally Sparrow, contacted Kathy and enlisted her aid in sending a message to Sally in 2007, although it would be another 18 years before she did so.

She died in 1987, shortly after writing a letter that her grandson, Malcolm Wainwright delivered to Sally Sparrow in 2007. Unlike Billy Shipton who, in order to fulfil his instructions, had to be given the date of his death, it appears that Kathy wasn't given this information, as her letter suggested the possibility that she might still be alive for a time after writing the letter.

Viewing Kathy's tombstone in 2007, Sally saw that the birthdate on it would have made Kathy 18 in 1920, indicating that Kathy lied about her age when she reestablished her life in the 1920s.

The Weeping Angel consumed the potential energy from the time Kathy Nightingale would have spent in the present. (DW: Blink)

Behind the scenes
Coincidentally, another individual, Julia Hardwick, is also known to have been transported back in time to Hull by the Weeping Angels. She arrived around 1887 (WC: A Ghost Story for Christmas). Julia died in 1949, but it is not known whether she and Kathy ever met. Julia's tombstone may have been located in the same cemetery as Kathy's.