Kathleen Phelan, pictured, 18, has been detained for three years for her part in subjecting ex-boyfriend Matthew Butcher, 19, to a violent and degrading ordeal

A 'sadistic' teenager girl and her new boyfriend have been locked up after torturing her former partner by forcing him to drink urine from a dog bowl and dragging him around with a rope.

Kathleen Phelan, 18, and aspiring vet partner George Russell-Brookes, 20, admitted subjecting Matthew Butcher, 19, to a violent and degrading six-hour ordeal.

During the attack, Mr Butcher was forced to drink a cocktail of beer, urine and salt from the bowl and was led around Phelan's flat on the length of rope.

He also had a knife jabbed in his chest and had his head rammed into a wall and forced to perform humiliating impressions of TV stars before he was finally released.

Mr Butcher, who suffers from Crohn's disease and wears a colostomy bag, confided in a friend who told his horrified parents and the police were called.

Phelan, Russell-Brookes, and their friend Christopher Emery, 19, who joined in the abuse, are now all behind bars after admitting false imprisonment.

Prosecutor James Dunstan said Mr Butcher had previously been in a relationship with Phelan, who had then begun a relationship with Russell-Brookes.

On August 17 last year a Polaroid printer for Phelan had been delivered to his home, so he took it round to her flat.

The door was answered by Russell-Brookes who invited him inside but then shoved him forcefully across the living room to the floor as Phelan locked the door behind him.

Russell-Brookes pulled him to his feet, only to push him over again and punch and kick him.

At first Phelan was shouting at him to stop, but then demanded their victim's phone and pushed his head against the wall with such force that the plaster cracked.

Her new partner George Russell-Brookes, left, 20, and his friend Christopher Emery, 19, have also been jailed for forcing Mr Butcher to drink urine and leading him around a flat with a rope 'like a dog'

She ordered him to make a call to get her wifi connection re-established, which he did and then asked to leave, but was told by Russell-Brookes: 'No, I've got so much more for you.'

Russell-Brookes made a FaceTime call to Emery, telling him: 'I'm on top of the world with this little rat I've got here.'

Mr Butcher was made to snort lines of salt and when he vomited as a result the trio forced him to eat it.

Phelan then got a cleaning spray containing bleach and sprayed it on his face and arms, causing a burning sensation, before telling the other two: 'We don't want him dead yet.'

She and Russell-Brookes then took turns to sit on his chest, and she began jabbing him to the chest with a knife.

Phelan took hold of Mr Butcher's finger and used it to activate his phone and access his bank account from which she transferred £150 into her own account before using it to make purchases and to pay for Emery's taxi.

When Emery arrived with a four-metre length of rope, the gang tied the victim's legs together and was tied round his neck before he was led around and made to 'act like a dog.'

They then ordered him to drink from a dog bowl in which they had mixed water, urine, beer and salt, telling him if he did not do so they would keep him for another 24 hours.

The trio were locked up at Warwick Crown Court, pictured, after the judge told them they treated Mr Butcher 'like a rat'

Rebecca Wade, defending Phelan, said: 'It started with her trying to stop what was happening before becoming an active participant.

'She is ashamed of the part she played in this awful episode.'

Nick Berry, defending Russell-Brookes, said: 'It was a sickening incident. His behaviour was utterly wicked.'

Sentencing the trio at Warwick Crown Court Judge Andrew Lockhart QC said: 'You Mr Russell-Brookes were intent on violence from the outset.

'At that stage Kathleen Phelan you were shouting at him to stop, but you flipped from that to heavy engagement in what followed.

'You Mr Emery knew someone was being held like a rat, and you went to join in.

'There was torture and humiliation. Any human being subjected by a fellow human being to this type of conduct will be seriously affected by it.

'In my judgement this is a very grave offence of false imprisonment, and in all your cases only a significant sentence of custody can be considered.'

Phelan, of Earlsdon, Coventry, who was 17 at the time of the attack, was handed three years detention.

Russell-Brookes, of Canley, Coventry, was jailed for five years and three months while

Emery, of Kenilworth, Warwickshire, was sentenced to four years and nine months in prison.