Jeremy Corbyn said convicted terrorists should 'not necessarily' have to serve the entirety of their prison sentences as Boris Johnson vowed to toughen up terror laws.
The Labour leader said when convicted terrorists are let out of prison 'depends on the circumstances' as he was grilled in the aftermath of the London Bridge attack.
Usman Khan stabbed a man and a woman to death on Friday before he was shot dead by police following his release halfway through a 16-year prison sentence for terror offences.
Mr Johnson said scrapping early release from prison for terrorists would have stopped the attack from happening.
The PM said this morning during an appearance on the BBC's Andrew Marr Show that it was 'ridiculous' and 'repulsive' that Khan had been released 'after serving only eight years'.
He also revealed 'there are probably about 74' people similar to Khan who had been let out early after being convicted of terror offences and that the government had taken 'a lot of action in the last 48 hours’ to make sure they pose no threat to the public.
The Prime Minister has committed to introducing mandatory minimum sentences of 14 years for the most serious terrorist offences and he has said some offenders should never be released.
But his approach is in stark contrast to Mr Corbyn's who told Sky News in an interview broadcast this morning that he was not against convicted terrorists being released part of the way through their sentence.
Asked if he believed that people convicted of terrorism offences like Khan needed to serve a full prison sentence, he replied: 'I think it depends on the circumstances, it depends on the sentence but crucially depends on what they've done in prison.'
Jeremy Corbyn, pictured on Sky News today, said terrorists should 'not necessarily' serve all of their jail term
Boris Johnson, pictured during an appearance on the Andrew Marr Show this morning, has vowed to get tougher on terror offences
Interviewer Sophy Ridge then asked: 'So not necessarily then?'
Mr Corbyn said: 'No, not necessarily, no. I think there has to be an examination of how our prison services work and crucially what happens to them on release from prison because I need to know whether or not the Parole Board were involved in his release, apparently they were not, they made that statement quite quickly after the release … after [Friday's] terrible incident.
'Secondly, there were apparently no probation service involvement in monitoring this former prisoner who after all had only served half his sentence and he came out I think a year ago and there has to be an examination of what goes on in the prison because prisons ought to be a place where people are put away because of major serious offences but also a place where rehabilitation takes place.'
Asked what Labour would do to change the current criminal justice system, specifically regarding terror offences, Mr Corbyn said funding was a crucial issue.
He said: 'Well we'd do a number of things. One, properly fund our prison service so that the prison officers are able to do their job both as prison officers as well as educators as well as people that deal with dangerous prisoners who