London Bridge hero John Crilly campaigning to change Joint Enterprise law

When Usman Khan stabbed two people close to London Bridge last November it was those attending the same conference who initially stopped him - one with a narwhal tusk, another was John Crilly who grabbed a fire extinguisher.

John had come out of prison the year before after his joint enterprise murder conviction was quashed. Now he wants to use his platform to campaign for a change in the law.

More information about John Crilly's campaign here.