HE’S best known as the Hollywood A-list actor behind gritty homicide detective Luther – who spent five series hunting down fictional sadistic killers in bloody scenes on BBC One.

But Idris Elba, in his crusading documentary Our Knife Crime Crisis, spent an hour blaming everything except drugs for the epidemic of violence. Drugs didn't get a mention, not once. You might say ...

Katherine Ryan, Tems, Jenn Nkiru, Jean-Michel Jarre and Joe Wicks are also among the speakers set for the first edition of ...