RTÉ Radio 1 announced on their longwave 252 kHz frequency at 1700 UTC today
(Sunday 25 June) that they will be off air on 252 kHz from "half-past twelve
Tuesday 27th June until the same time on Saturday 8th July" (local time = UTC
+1)
This is for a replacement of the base-plate of the transmission mast
according to the announcement.