3. Closure of airports to UK traffic: All North Atlantic routes for the EU are controlled by UK ATC..!
I don't know enough about this subject but I would be rubbing my hands together if I was in their boots! What an opportunity to take business from the UK.
Err somehow doubt that would happen as you would require to overfly UK airspace and Eire wouldn't be able to fly anywhere if the status quo does not remain, UK controlled airspace.
see
https://www.quora.com/Ireland-may-ca...ge-of-attitude