Boris Johnson is said to be weighing up a sensational bid to make his Tory leadership comeback.Following Liz Truss's resignation as prime minister on Thursday, reports broke suggesting Mr Johnson would be open to a return to No 10.While he is yet to officially declare his candidacy, it's believed he has more than 20 MPs willing to back him.Ahead of his potential return, take a look at Mr Johnson in profile, from his early days at Eton and Oxford, to his premiership as prime minister.