Who could replace Theresa May as Tory Leader?

She promised Conservative MPs that she would step down before the 2022 General Election. Now Theresa May’s former policy adviser George Freeman has called for her to resign straight away in order to “unite the country”. But if she does go, who will take over? Various Conservative leadership contenders have been jockeying for position. Our Political Correspondent Michael Crick assesses the runners and riders.