Work and pensions secretary announces candidacy, saying he would ‘deliver’ for those who voted to leave EUStephen Crabb, the work and pensions secretary, will formally announce his bid to be Conservative leader on Wednesday morning as nominations open to decide the new prime minister.Crabb, who is running on a joint ticket with Sajid Javid, the business secretary, is positioning himself as a champion of blue-collar conservatism to challenge the frontrunners, Boris Johnson and Theresa May.