At time of writing (15.00) no flights are landing or taking off from Dublin. The responsible agency - the Irish Aviation Authority have no statment on their website (yet?) but have told the Irish Times that a crew of engineers are on site trying to fix radar problems that have dogged the airport on and off over recent weeks.
Safety is of great importance but still it seems extraordinary that the airport might be completely shut down (even if it turns out to be only briefly) with no notice to customers or airlines.
The airport press office are recommending that In the meantime passengers are advised to “contact their airline for up todate information regarding their particular flight BEFORE coming to the airport.” which does not bode well for things normalising in the next hour or so.
You can check real time arrivals and departures information here. It is not a pretty picture at present.
[Update 15.30] Aer Lingus have now advised that all departures after 5PM today are cancelled due to the ATC disruption.
[Update 16.10] A limited number of flights are again arriving and departing. Apparently the ATC system is now operating at “half capacity”.
[Update 08.30 Thursday 10th] This morning the Irish Aviation Authority says the situation has stabilised. However, it seems delays will persist. We shall see.