On 29 November 2019, a man armed with knives carried out an attack in the London Bridge area. Usman Khan, wearing a fake suicide vest, was shot dead by police after the incident.
Phone footage from the day shows Darryn Frost confronting Khan with a narwhal tusk, helping to end the attack. A year on, Frost spoke to BBC Breakfast about his haunting memories of the event.
Frost described the chaos and fear of the moment, but also the instinct to act. He said the narwhal tusk, taken from a nearby building's wall display, was used to keep Khan at bay until police arrived.
The attack left two people dead and three injured. Frost's actions were widely praised, and he has since been featured in a BBC portrait commemorating the heroes of the day.



