The Prime Minister must therefore make sure that Northern Ireland's Good Friday Agreement is not undermined - and that peace and stability is therefore preserved. Peace in Northern Ireland was made possible partly because both the North and the South of the island of Ireland was part of a greater whole – namely the European Union. That meant that the border between the two could become virtually invisible. The North and the South were in different national states – but economically and in other ways the island of Ireland currently functions as if it is one territory. It is that dual reality that both Republicans and Unionists were prepared to accept. Our departure from the EU could undermine that peace-giving status quo. The Prime Minister must therefore ensure that there is no hard border of any sort between Northern Ireland and the Republic. He must also ensure that Brexit does not undermine the economic viability of Northern Ireland. He must ensure that unemployment in the province does not rise as a result of Brexit. And he must ensure that the UK government replaces all EU funding of development, agriculture, peace initiatives and other programs in Northern Ireland. Over recent years the EU has, on average, pumped £536 million per year into Northern Ireland!

Brexit-related promises (about Northern Ireland) from Boris Johnson and his colleagues:

On Nov 7, 2019: Boris Johnson told Northern Ireland businesses they 'can put customs declarations forms in the bin' because there will be “no barriers of any kind” to trade crossing the Irish Sea. He told them that “there will be no forms, no checks, no barriers of any kind" between Northern Ireland and the rest of the UK. How he will achieve that, without simultaneously damaging the Good Friday Agreement (and potentially undermining peace), is not yet entirely clear. But he clearly needs to achieve both objectives.