Corbyn demands full investigation of any mistakes over London Bridge attacker

Britain's main opposition leader on Saturday called for an investigation and said there were questions for the probation service and parole board after a man who had been convicted on terrorism offences killed two people at London Bridge.

"There's got to be a very full investigation and clearly there's been a disaster," Labour Party leader Jeremy Corbyn told broadcasters.

Wearing a fake suicide vest and wielding knives, Usman Khan went on the rampage on Friday afternoon at a conference on criminal rehabilitation beside London Bridge.

He was wrestled to the ground by bystanders and then shot dead by police.