Katharine Birbalsignh, the outspoken head of the outstanding Michaela Academy – who has been dubbed Britain’s strictest teacher – has been made chief of the social mobility commission, tasked with helping disadvantaged children get ahead. In this interview from July last year, Mattie Brignal speaks to Birbalsingh about her school’s controversial philosophy, how a victim mentality is holding children back and why she’s still teaching dead white men.