What will happen during today's sentencing?published at 10:59 BST
Dominic Casciani
Home and legal correspondent
A sentencing of any offender is a very formal and structured court hearing.
Judges follow both the laws agreed by MPs in Parliament on the sentences for particular crimes - and then the detailed guidelines developed down the decades about how best to apply those in specific circumstances.
Mr Justice Bright presided over the case and therefore knows all of the evidence. He saw the victim of the attack give her account in person and saw for himself how Quinn denied that he could be the attacker.
The prosecution team will tell the judge what category of offending the crime falls into - and the defence barristers will speak on Quinn’s behalf about factors in his favour. The one thing he will not get is a discount on the sentence which is always given to offenders who admit their crimes early, so as to spare everyone the pain of a trial.
The judge will have to decide how much harm Quinn caused and how personally responsible, or “culpable” he was. Those findings then lead him to what’s called a “starting point” for years in prison.
The judge will then take into account other aggravating and mitigating factors. All of this will lead the judge to his final decision - the sentence.

