The court heard that Dr Cunningham, 27, of Dundee University, still considered himself a trainee and Prof Black, who had supervised his PhD, was his line manager.
Her father, Phelim, 38, is a manager at Wembley Park station, her 17-year-old brother Phelim is a trainee at the maintenance firm Tube Lines and her godfather is a driver on the Jubilee Line.