Public security

London Bridge attack: Darryn Frost on using a narwhal tusk to stop knifeman

A man has described how he fought off the London Bridge knifeman with a narwhal tusk before pinning him to the ground to help end the attack.

Darryn Frost, 38, was seen in pictures confronting Usman Khan, 28, who was armed with two knives.

The civil servant has spoken of his "deep hurt" at not being able to save Jack Merritt and Saskia Jones who were killed by Khan on 29 November.

Khan, who was wearing a fake suicide vest, was shot dead by police.

Mr Frost, who works in communications at the Ministry of Justice, told how he grabbed the narwhal tusk from the wall in Fishmongers' Hall as Khan launched his attack during a prisoner rehabilitation event near London Bridge.

The South African-born Londoner then chased Khan onto the bridge, where footage captured him and fellow members of the public fending off the attacker.