The Irish embassy, at 17 Grosvenor Place in London, is a short distance from Buckingham Palace. Inside the front door, to the left, there is a large room which, later this year, after it is spruced up, will become the permanent home of Colin Davidson’s portrait of Edna O’Brien. When talks were taking place between the British and Irish governments, the DUP and Sinn Féin before power-sharing at Stormont was restored in 2007, a Sinn Féin delegation briefly set up camp in that same room.   At one stage during down-time in daylight hours, Gerry Kelly stretched out and napped on…