Whilst not being political, it is impossible to consider the implications on the rail industry in the whole of Ireland without considering the politics involved. If the UK votes to leave, it won't be a quick exit. Up to two years is set out in the EU treaty, a long time indeed in politics. Time for a change of prime minister, maybe even an election and change of government. Now that would be interesting since, apart from UKIP, none of the parties likely to be involved in government is in favour of Brexit. It's that kind of uncertainty that will have the biggest effect of the rail industry in Ireland.
Stephen