There is no doubt that a UK withdrawal from the European Union following the June referendum will have profound implications for Britain but it is in Northern Ireland where the effects will not only be far-reaching but immediately visible. According to a Cabinet Office paper on the impact of a vote to leave the EU, we can expect to see a return of customs posts on the only land border between the UK and an EU member state. The assessment warned that breaking the link with Brussels would confront Northern Ireland with difficult issues over its relationship with the Republic, saying it ``would[...]