Ballet girl was 'hooked on Tumblr where users encouraged her to harm herself' Tallulah, a talented rider and dancer who lived with her family in a £1 million house in leafy West Hampstead, north London, had also escaped reality by creating a cocaine-snorting online character, the hearing was told. St Pancras Coroners' Court heard today how in private diaries seized by the police following her death, Tallulah had scribbled 'I am fat' and the word 'ugly' repeatedly. The teen, who attended £11,000-a-year St Margaret's School in Hampstead a month before her death after being bullied at St Marylebone school in St Pancras, also wrote "what am I? You are nothing" and repeatedly wrote "I am worthless" on other pages. Det Sgt Adrian Naylor, who deals with fatalities for British Transport Police, said computers and diaries removed from the family home showed "disturbing writing relating to self-loathing and self-harm." He added: "We couldn't identify if any of the images were of Tallulah, but one was named 'my arm' and in an exchange with a like-minded individual, she was asked 'are those pictures of you?' and Tallulah replies 'yes'. It was alluded to [that she wanted to kill herself] on several occasions. It was alluding to her saying she didn't want to be here and things like that. The diary and journal are much the same thing. It is pretty dark, pretty sad and pretty bleak. She had written 'I am fat' repeatedly, over and over again. Jurors were shown the grim messages Tallulah had written, and reminded by senior coroner of Inner London North Mary Hassell that she was a "very lovely looking young woman." When asked by Ms Hassell if there was anything that could be seen as a "trigger" for her death, DS Naylor replied: "There was no specific trigger. It could be a combination of what appears to be relationship breakdowns with people on the internet, concern about self appearance and basically engaging with like-minded people who seem to feed that obsession. It appeared from the diary and journal that Tallulah had very low self-esteem. The inquest heard how the teenager was being treated by the Tavistock and Portman NHS Mental Health Trust for clinical depression. The letter said: "I gave up talking, I don't know what to say anymore. I'm too upset most of the time to talk and when I am not upset, I am angry so I shut myself down as a defence mechanism. DS Naylor told the inquest how CCTV footage he reviewed after the incident made him believe Tallulah falling in front of the train was a "deliberate act." Tallulah's dance teacher, Peter Laycock, told the inquest that she was the most confident pupil and talented ballerina when she began her GCSE in dance in January 2012. He said that she began to change the following month, adding: "She began as very outgoing and well liked, she was the leader of the group. Because Tallulah was naturally very gifted at dance she also had a brilliant sense of humour and in many ways she was the most able member of the group. Initially, when the course began, Tallulah started out as really one of the more gregarious characters in a very positive way. I knew that the other staff noticed a change in Tallulah after the February half-term break, I actually contacted Sarah by email, I was concerned that she was losing motivation or that she wasn't happy on the course. She seemed to have started in a positive and enthusiastic way - it wasn't after that February half-term break that she was difficult or that there were many other concerns, I just felt that she didn't have the same spark. Mr Laycock told jurors at the inquest of the last time Tallulah went to dance class on October 7, exactly one week before her death. "She was on a much more upward trajectory at that stage," he said. She left the session after the students were creating performances for assessment which actually wasn't for months. She had done some brilliant work with a student she was particularly close with in sessions. I know the following week that the student was quite annoyed that Tallulah wasn't there initially. "Tallulah had said to her "I'll see you next week - I can't wait to continue"'.