This bracing feature debut, set in the rap battle scene in Southend, is a showcase for an electric collection of new British talent. Director Ed Lilly deftly handles a cliched story – there are parallels with everything from Eminem in 8 Mile to boxing drama Creed – giving it a distinctive, persuasive edginess.

The performances, from a cast that includes grime artists and rappers, are unpolished but authentic. Particularly impressive is Connor Swindells as Adam, the foster-homed teenager who finds a voice and a family through the scene, and Ellie James, in a small but eye-catching role.

But for all the impressive qualities of the picture, it does feel as though there is a rigid upper-age limit for its audience. The ultra-aggressive verse, which brandishes homophobia and misogyny in place of more dangerous weapons, certainly won’t be for everybody.