Ireland will block progress of Brexit talks without border guarantee

Ireland’s prime minister, Leo Varadkar, issued a stark warning that the progress of the Brexit negotiations was at great risk of even further delay, during a day of stinging public rebukes for Theresa May as she met sceptical EU leaders at a Swedish summit.Varadkar said he would not be prepared to back progress of the Brexit negotiations to trade talks at the summit in December without a formal written guarantee there would be no hard border in Ireland.