You are welcome with your UAV in Ireland. UAVs +1 kilo must be registered.
Maximum take-off weight: No limit
Maximum hight: 120 meters / 393 ft. in uncontrolled airspace and 15 meters / 49 ft. in controlled airspace
Maximum horizontal distance: 300 meters 980 ft, and keep visual contact with UAV
Insurance: Not known
Minimum age: 16 year
Distance Airports / Heliports: 5 km / 3.18 mi.
Night flights: Prohibited
Prohibited: not above churches and national monuments
Useful link and registration: IAA: Rules and forms