Any trade agreement between Europe and the US will at best take until the middle of next year to negotiate and could drift until the end of 2017, according to EU ambassador to the US David O’Sullivan. He was speaking at a seminar organised by the Institute of International and European Affairs (IIEA) in Dublin on Monday.Responding to a question from the Irish Farmers Journal, O’Sullivan explained that the complexities with international trade negotiations made prediction of timing or outcomes impossible. It would need everything to fall into place easily and quickly to allow negotiations on a Transatlantic Trade and Investment Partnership (TTIP) treaty to conclude this side of the US presidential election.