Spain's prime minister Pedro Sanchez and Taoiseach Leo Varadkar prior to the start of a EU leaders' summit at the European Council building in Brussels on Thursday. Photograph: Ludovic Marin/AFP Croatia’s prime minister Andrej Plenkovic is a man of few words, unusual in itself in a politician. Asked by journalists what his message was for EU leaders as he headed into a pre-summit meeting of European EU leaders on Thursday, Plenkovic was a man of only one word: “Unity”. Charles Michel, the chairman of the European Council, the group of heads of government which is the EU’s most powerful decision-making...