The actor and playwright is rapidly becoming one of the most exciting faces of British theatre. Now he's stepping into the shoes of Bob Marley in the new West End musical Get Up, Stand Up Arinzé Kene's life is usually one of perpetual motion: write, act, devise, repeat. Rest isn't usually in the equation. During Misty " his 2018 play that became a sensation, melding a story about violence, gentrification and displac…