An inquest is held into the 2012 death of ballet student Tallulah Wilson.
She is said to have visited a number of websites based on self harm and anorexia.
Giving evidence at the inquest into the schoolgirl’s death today, Mrs Wilson told the court, her daughter had become an 'internet addict' and had 'spiralled' out of control.
A 15-year-old ballet school pupil created a fantasy cocaine-taking character online in order to escape reality, an inquest heard.
Tallulah Wilson was hit by a train at St Pancras station on October 14 the day after her mother discovered her alter ego.