Leo Varadkar open to conditional review mechanism for border backstop

Update 5.19pm: Taoiseach Leo Varadkar has told Theresa May he is willing to consider proposals for a review clause in any backstop plans for the Irish border in the wake of Britain leaving the EU.

During a phone call between the Taoiseach and British Prime Minister today, Mr Varadkar said that the outcome of a review could not involve a unilateral decision to end the backstop.