Tony Blair became prime minister in 1997 with a landside majority and an approval rating of 93 per cent. When he resigned in 2007, his popularity had slumped and his party was in disarray. With access to Whitehall officials, politicians and military officers, this investigative history offers a day-to-day account of his decade in office and his subsequent career, charting the steps – the spin, the Iraq war, the Chilcot enquiry – by which his reputation was eroded.