Nicholas Jacobs, 44, has been charged with the murder of Pc Keith Blakelock, who died in the Broadwater Farm riots in 1985, the Crown Prosecution Service said today.
More top news
Paramedics attended a scene in Willesden, north-west London, on Monday afternoon where they found the teenager with stab wounds.
At least five people have suffered minor injuries but the cause of the blast is still unknown.
A songwriter from Harlesden who wrote a track for Beyonce's Lemonade album has been nominated for a Grammy Award.