Terri-Mae Lunt, 13, was savagely kicked, punched and dragged by her hair as classmates looked on and did nothing to stop the horrifying assault.

Her parents have now pulled the Year eight pupil out of classes and say she is too afraid to go back.

Terri-Mae’s mother Melanie, 42, and father Terry, 40, tried to press charges against the other girl involved but police said they were unable to establish how the brawl began because of inconsistent accounts from witnesses.

The attack was only stopped when a bus driver and local resident stepped in to intervene.

In the lead up to the attack, Terri-Mae, of Mosten, Manchester, said she had been sent abusive text messages from two fellow pupils at Manchester Creative and Media Academy in Blackley.

She claimed that one of the girls told her she ‘wanted to fight her’ last month.

Terri-Mae tried to leave school early on May 11 in an attempt to avoid the girl but was chased and attacked just yards from the school gates, her father said.

Mr Lunt, 40, a roofing contractor, said: ‘The video is absolutely traumatic to watch.

‘I am ex-forces and I’ve never seen anything like it.

‘She was in a state. She had severe bruising to her face, chest and arms, and bite marks on her. She was lucky nothing was broken.

‘I am absolutely livid, I feel so let down, by the school and the justice system.

'As a father, at first I felt anger but then you put all your faith in the agencies like the police and the school and everyone has just come back and said "there is nothing we can do".

'They need to realise the suffering that is brought not only my daughter but us as a family too - she is just not the same kid.'

Terri-Mae’s mother found her injured daughter after stumbling across the scene. She immediately drove her to hospital, fearing Terri-Mae was concussed. The 13-year-old also suffered severe bruising and bite marks.

Mrs Lunt said: ‘I saw about 100 black blazers stood outside the school gates and just thought, "I hope that’s not Terri-Mae”. I parked up and jumped out.’

The school suspended the girl involved in the attack for a week and another pupil for two days. 

Mrs Lunt added: 'The school let the girls involved return after two days for one and a week for the other and when we asked why they said they felt that it was punishment enough.

'We still had our faith in the police at that point but we didn't want the child involved to have a criminal record because kids make mistakes and deserve a second chance.' 

Police were informed of the incident by the Lunts and a restorative justice session was organised.

When they attended they found the other girl had brought a solicitor.

Terri-Mae asked for the session to go ahead without the lawyer but the attacker’s parents refused.

The Lunts tried to press charges but, despite having the video footage, police ruled there was insufficient evidence. 

Mrs Lunt said: 'We were given the option of restorative justice but when we went to the station the other family brought a solicitor and refused to speak without them because they didn't want to incriminate their child.

'I just felt all the way through that the police could do without the hassle - it was three or four days to get back to me every time and that's why it has taken so long.'

Having withdrawn her from classes, Terri-Mae’s parents found their daughter a temporary eight-week placement at nearby Failsworth School, although they are still looking to secure her a permanent place.

The principal of Blackley school, Rebecca Smith, said: ‘This incident took place outside of school hours and off school premises, and as such has been dealt with by GMP [Greater Manchester Police] as a police matter.

‘Notwithstanding this, the school has taken it very seriously and has liaised with them to carry out our own internal investigation that has resulted in sanctions for those involved.’

A GMP spokesman said: ‘Greater Manchester Police thoroughly investigated this matter and more than 60 witness accounts were taken throughout the course of the investigation.

‘Despite these efforts it was decided that there was insufficient evidence to progress this matter to the CPS and, as a result, the investigation was closed.’