An excellent look at Britain's history and ongoing issues with racism. The book feels like a collection of closely related essays that build on each other, explaining and discussing issues like white privilege, systemic racism and intersectionality.
Perhaps the only oversight is that there isn't much discussion of how racism interacts with religion, but given the breadth of topics it does covers and the deep minefield of that area this isn't a major issue.
If you feel under informed about the reality of racism in the UK, this is a great place to start.