Keir Starmer has taken the first step: swift justice for those directly guilty of violence. What’s needed next will be harder, says the Guardian columnist Gaby Hinsliff
Steve McQueen, Tracey Emin, Steve Coogan, Adjoa Andoh, Danny Dyer, Jesse Darling and many more spell out what must be done to restore Britain’s cultural lifeblood, from ending elitism to supercharging libraries – and flooding schools with music