Boris Johnson 'caves in' over Brexit red lines

Boris Johnson has backed Theresa May's crunch speech on Brexit - despite her appearing to cross two of his previous 'red lines'.Mrs May also suggested the European Court of Justice (ECJ) would overrule UK law beyond March 2019.The plans directly contravene two of the four so-called Brexit 'red lines' Mr Johnson revealed to The Sun just days before Tory conference.