An Associated Press retrospective marks a decade since the UK's 52%-48% vote to leave the European Union, tracing the political wreckage from David Cameron's resignation through Theresa May, Boris Johnson, Liz Truss's 49 days, and Keir Starmer's June 22, 2026 decision to step down after two years. Academic Chris Grey and historian Margaret MacMillan say Brexit still haunts British politics, as voters desert the two main parties for Nigel Farage's poll-leading Reform UK, an Ipsos survey finds 52% would rejoin, and the AP judges Brexit remains unfinished business.