It's a bit of a dodgy headline that. The piece discusses various aspects of the situation and Raab and Corbyn's respective responses on Sky News, but the headline makes it seem as though Corbyn's just come out and said the above.

Corbyn

Labour leader Jeremy Corbyn told Sky News that a person convicted of terrorism offences should “not necessarily” serve their full sentence.

“It depends on the circumstances, it depends on the sentence, but crucially it depends on what they’ve done in the prison,” he said.

Corbyn, a veteran peace campaigner, said the police had no choice but to shoot the attacker.

“I think they had no choice. They were stuck with a situation where there was a credible threat of a bomb belt around his body and it’s an awful situation for any police officer, any public servant to be put in,” Corbyn said.

Raab

Foreign Minister Dominic Raab suggested a Conservative government would strengthen sentencing measures and end the practice where serious offenders can be automatically let out of prison early.

“We’ve said we would expect for the serious terrorist offences a minimum 14-year sentence,” Raab told Sky News’s Sophy Ridge on Sunday.

“We don’t think that it is the case that they should all necessarily be released, we think for some offences they should be imprisoned for life, and we also think that terrorist offenders should serve their full sentence.” Foreign Minister Dominic Raab suggested a Conservative government would strengthen sentencing measures and end the practice where serious offenders can be automatically let out of prison early.

“We’ve said we would expect for the serious terrorist offences a minimum 14-year sentence,” Raab told Sky News’s Sophy Ridge on Sunday.

“We don’t think that it is the case that they should all necessarily be released, we think for some offences they should be imprisoned for life, and we also think that terrorist offenders should serve their full sentence.”