Apart from the resumption of sectarian violence as the hard border goes back up?If a deal doesn’t work for all parties as expected then it should be amended, that’s what rational people do. The U.K. will do what is right for NI and if need be throw the whole WA in the bin and go to WTO. If I were you I’d be more concerned about the effect of the Australian deal upon Irish beef production and exports, the EU allocation of fish quotas, and the forthcoming changes to corporation tax that will affect the South. NI will do OK......