An investigation is under way this morning into the technical problems with the Shannon Air Traffic Control flight radar system, which caused disruption to flights to and from Shannon and Cork.

The Irish Aviation Authority has said it still does not know what caused the issues with its air traffic management system that led to the temporary closure of Irish airspace last night.

Director of Commercial Technology with the IAA Philip Hughes told RTÉ’s Morning Ireland that technical issues do occur, which is why there is an independent back up system, which came into effect last night.

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