The east Londoner won a Bafta for her performance as the teenage lead in Sarah Gavron's hit 2019 film. Now, on the eve of three new stage and screen projects, she talks about her whirlwind four years At 15, Bukky Bakray was in drama class at school in east London, working her way through lines she can no longer remember, when she spotted two unfamiliar figures at the back of the room. "We all thought they were Ofsted…