The security minister refused to say whether the attack on London Bridge by Usman Khan showed a "failure" by authorities.

Mr Lewis repeatedly refused to comment on the specifics of the incident, but said that more assessment was needed of the sentences given to violent criminals.

"We take what action we need to do and we believe is right under the advice of the police and look at all of the lessons learned from any case as quickly as we can to ensure people's safety," he told Sky News.

Mr Lewis said that although the UK terror threat level had been recently reduced from "severe" to "substantial", there had been "no change in the posture and the work" of police and counter-terrorism forces.

He added that the Government wants to move "very swiftly" in its review of sentencing for violent crimes following the London Bridge attack.

"I think it is right that we do have to look again at the sentences, as I say, around these violent crimes," he told the Today programme.

"The Prime Minister has argued that, has made that point previously and made it very clearly last night.

"We will want to move very swiftly because our first priority is the safety of people around the country."