Diene Petterle, 22Summers co-founder and executive producer, says: "This film is an opportunity to understand knife crime from the inside, through those who live and breathe its reality every day, including perpetrators at Feltham Prison and Young Offender Institution. You don’t often get that kind of access."

The 'Luther' star, who in recent years has been vocal about his stance as an anti-knife crime activist, will meet with U.K. prime minister Keir Starmer and King Charles in the documentary.