Considering economic growth forecasts for time spans as short as quarter tend to be revised more often than not, ten year forecasts are about as useful as a pair of two left shoes.
That said, I dont think it takes much to figure that this whole Brexit thing is not a good idea for our economy.
Alas, the fact that Brexit would be a disaster for Ireland was obvious once the vote was cast. Govt should have been telling us of all the downsides since then. Brexit means that no one wins and the biggest losers will be UK and IRL.