DUBLIN (Reuters) - Britain s talks on exiting the European Union cannot progress, as London wishes, to cover trade relations until it gives more clarity on what will happen at the border with Ireland, Irish Foreign Minister Simon Coveney said on Friday.  On the border issue, I m sorry but we need more clarity than we have right now. We cannot move ahead to phase 2 on the back of a promise that we don t see any delivery mechanism to make a reality,  Coveney told a conference. 