A former prisoner was one of several ex-offenders to bravely confront London Bridge attacker Usman Khan on Friday - despite the killer claiming to be armed with a bomb.
Marc Conway was chatting with prison education specialists when screams filled Fishmongers Hall as Khan began his rampage.
But as others fled from danger, Mr Conway headed straight for it, bravely joining a group of people chasing and confronting Khan.
Conway is a former prisoner and was one of several ex-offenders, including Khan, who attended the London conference, a University of Cambridge-run project that included ex-inmates, University professors and educational professionals.
Another hero was kitchen porter Mohammed, who tackled Khan while out on his lunch break before, incredibly, heading back to work.
Khan attacked the conference, killing Jack Merritt, 25, who was the course co-ordinator.
Marc Conway, wearing a grey shirt and blue jeans, was one of a group of people who bravely confronted London Bridge attacker Usman Khan
Mr Conway, circled, bravely ran after Khan, despite the killer shouting that he had a bomb. Mr Conway was part of a group that disarmed Khan
A chef named Lukasz at Fishmongers' Hall who grabbed a narwhal tusk to fight off a knifeman is the latest hero to be identified in the London Bridge terror attack
Jack Merritt is pictured above with his father David, and mother, right. Mr Merritt was the course co-ordinator for Learning Together, an education scheme run by the University of Cambridge's Institute of Criminology that killer Khan had attended on Friday
A witness said a small group of 'immensely brave' men, including Mr Conway, never hesitated as they confronted Khan, forcing him out of the building.
Mr Conway now works as a policy officer at the Prison Reform Trust and, according to his LinkedIn page, is studying for a degree in Criminology at the Open University and another in psychology at Cambridge.
Wearing a grey T-shirt and blue jeans, he is in a group photo from the event and is also later seen among a group of people surrounding Khan as police arrived.
The other recently revealed hero, kitchen worker Mohammed, held Khan down before police arrived. He was later interviewed as a witness.
Speaking close to the murder scene last night, Mohammed's boss told the Sun: 'He was there. He held the guy down.
'He was on his break. He came back afterwards to work.
'He didn't say anything. He went back to work. He was washing dishes.'
A statement from the Prison Reform Trust, an independent prison charity, noted that staff from several criminal justice organisations had been present at the conference, according to the Times.
Police officers stand by forensic tents outside a residential address in Stafford, believed to be a bail hostel where Usman Khan stayed
Khan stabbed two people to death in a terror attack on London Bridge and was an ex-prisoner convicted of terrorism offences and released last year
Police forensics officer (right) passes bolt cutters over a wall to a colleague as they work at the rear of a residential address in Stafford
It asked for privacy for those attending to 'allow them the time and space to come to terms with this traumatic event'
**Do you know any of the heroes who helped to take down Usman Khan? Let us know: [email protected] or on 02036150773**
Another hero from the tragedy was a chef called Lukasz who grabbed a narwhal tusk from Fishmongers' Hall to fight off Khan.
He is currently recovering in hospital after the London Bridge terror attack.
Lukasz, originally from Poland, tried to pin down Khan, who wore a fake suicide vest, using a five-foot narwhal tusk he took from the wall of Fishmongers' Hall.
A friend of of Lukasz's told The Mirror: 'The staff have been asked not to say too much, but I've his number and he's still in hospital.
Thomas Gray (left) has described the moment he confronted the London Bridge attacker and stamped on his hand, forcing him to release one of two kitchen knives. Another of the heroes of yesterday's attack is a convicted murderer out on day release, James Ford (right), it emerged
Mr Merritt and a woman were killed in the attack, and three others were injured.
Video exclusively obtained by the Daily Mail shows Lukasz using the narwhal tusk as he and a group of men try to pin down the attacker.
His colleague at Small Car Big City, Stevie Hurst, told BBC Radio 5 that he ran towards the terrorist and kicked him in the head
The Queen today praised the 'brave individuals who put their own lives at risk to selflessly help and protect others' during yesterday's attack.
Hero Lukasz's colleague, who asked to remain anonymous, told The Times: 'Lukasz grabbed a nearby pole and ran at him, getting stabbed in the hand in the process but continued to pin him down.
'Being stabbed didn't stop him giving him a beating. Lukasz is a hero.'
Lukasz is thought to have suffered from cuts but is not critically injured.
This comes after fearless tour guide Thomas Gray, 24, was revealed as one of the heroes who helped to disarm the attacker.
Mr Gray described the moment he confronted the London Bridge attacker and stamped on his hand, forcing him to release one of two kitchen knives.
He and a colleague, who had been driving tourists around the capital in classic Mini Coopers, had been travelling over London Bridge to pick up some more customers at a hotel when they saw the knifeman being pinned to the floor.
Mr Gray and his colleague then bravely got out of their vehicles to help, as three other men attempted to keep the attacker on the ground.
He said: 'There were three big blokes grappling with another man and had him on the floor. I asked what was going on and someone said the man on the ground had just stabbed two women.
'I saw that he had two kitchen knives with blades about 8-inches long. One in each hand. One of the knives appeared to be attached to his hand by duct tape.