On 29 November 2019, five people were stabbed, two of them fatally, in Central London. The attacker, Usman Khan, had been released from prison in 2018 on license after serving a sentence for terrorist offenses.

Since Khan was considered a "success story" for a Cambridge University rehabilitation program, and was featured as a case study by the University, he was attending an offender rehabilitation conference in Fishmongers' Hall. He threatened to detonate what turned out to be a fake suicide vest and started attacking people with two knives taped to his wrists, killing two of the conference participants by stabbing them in the chest. Several people fought back, some attacking Khan with a fire extinguisher, a pike and a narwhal tusk as he fled the building and emerged on to London Bridge, where he was partially disarmed by a plain-clothes police officer. He was restrained by members of the public until additional police officers arrived, pulled away those restraining him, and shot him. Khan died at the scene.