The churn of British Prime Ministers in the last decade has been fuelled by deep divisions caused by Brexit and leaders entering No10 without a proper plan, experts have suggested. As Keir Starmer ’s departure from No10 looms, the UK looks set for its seventh PM in ten years in Andy Burnham . Mr Starmer announced his resignation this week, with the former Greater Manchester Mayor expected to replace him without a contest. It comes after years of political turbulence, with Tory leaders David