The government is being urged to make lessons on migration, belonging and empire mandatory in every secondary school in England. The Runnymede Trust, a race equality thinktank, said last year’s Windrush scandal had exposed a “shocking lack of understanding” at government level about the winding up of the empire. It wants to see a new approach to teaching on the subject in schools, which will ensure all pupils learn about migration and empire, and teachers are properly trained and equipped…