Terrorists should not be forced to serve their full sentences in prison, Jeremy Corbyn has said, after a jihadi was released early to kill two people in the London Bridge terror attack.

The Labour leader was asked by Sky News' Sophy Ridge whether those convicted of terror offences should serve their sentences in full.

He said: "I think it depends on the circumstances and depends on the sentence and crucially depends on what they've done in prison."

Pressed by Ridge, who asked him, "not necessarily then?", Mr Corbyn responded: "Not necessarily, no."

As the political row over Friday's attack intensified, the Labour leader said he believed police officers had "no choice" but to shoot Usman Khan dead after he stabbed a man and a woman to death, following his release halfway through a 16-year prison sentence.

His comments came as the Prime Minister said that because the "broken hung parliament was preoccupied with blocking Brexit", the Government was unable to make the changes required to keep violent offenders and terrorists in jail for longer.

Mr Corbyn said: "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 yesterday's terrible incident.