Ryanair has warned that they may have to stop selling flights to the UK at the end of 2018.
They say that the scenario could potentially come into place if Britain and the EU fail to agree on a post-Brexit aviation deal.
According to the Irish Times, the airline's chief executive Michael O'Leary and commercial officer David O'Brien said on Wednesday that they were prepared for a “worst-case scenario” where the UK is no longer part of the EU’s Open Skies air transport treaty after Britain leaves Europe in March 2019.
The agreement allows any airline of the European Union and any airline of the United States to fly between any point in the European Union and any point in the United States.
Mr. O'Leary suggested that because Ryanair need to plan where to base its aircraft for the previous year they will have to finalise this by the end of next year.
This would, of course, be a bit of a pain for anyone who does a lot of travel between Ireland and the UK, which to be fair is a lot of people.