Miles, who according to Metro UK, suffers from mixed personality disorder and Asperger’s syndrome and will be sentenced in October.
Lewis Power, who is defending the 17-year old described the case ‘as very difficult, complex and unique’.
Guildford crown court judge, Christopher Critchlow had this to say: ‘You have pleaded guilty to the gravest crime and you are only 17 years of age. You will be given credit for the fact you have owned up to what you did.’
Family of the victim in a touching statement said: ‘Elizabeth was a kind, caring, loving and gentle girl and her death has left our lives broken beyond repair, we have lost our Sunday child. Throughout her GCSEs, Elizabeth studied hard and did very well. She was now working towards her A-levels and we were all extremely proud of what she had achieved.’
Miles is to be remanded in custody until Thursday, October 2, 2014.