Amber Rudd lost her job as U.K. Home Secretary this weekend amid a widening immigration scandal. Yet there’s every chance Britain’s political class—and voters—will let this crisis go to waste.
Ms. Rudd’s resignation is the latest fallout from the Windrush scandal. For two decades starting in the late 1940s, the U.K. accepted migrants from across the Empire (later, the Commonwealth) to rebuild after World War II. Known as the “Windrush generation” because one of the first ships to bring them was the HMT Empire Windrush, hundreds...