Britain risks “flames” of racial and religious conflict because of a “liberal self-delusion” over the impact of mass immigration, the former head of the equality watchdog Trevor Phillips claims today.

In a startling assault on decades of official multiculturalism and diversity policy, the founding chair of the Equality and Human Rights Commission argues the UK is being allowed to “sleepwalk to catastrophe” by leaders too “touchy”, “smug”, “complacent” and “squeamish” to talk about race.

Drawing a direct parallel with Enoch Powell’s notorious “rivers of blood” speech, he likens Britain’s politicians, media and educated elite in general to the Emperor Nero fiddling while Rome burned, unable even to recognise the “dark side of the diverse society”.