Bookmarked How the Irish backstop emerged as May's Brexit nemesis (the Guardian)
Ireland was streets ahead of the UK when it came to planning for Britain’s exit

The Irish government started planning for Brexit in 2014, a full 2 years before the UK referendum, and lobbied both EU and Cameron to secure a yes vote. In contrast it seems the UK started debating the impact of Brexit on the Irish border in earnest about two weeks before the 29 March cliff-edge. “Easiest deal in history” and all that.