Winds are currently Northwesterly aloft towards Ireland, Scotland and the UK through to early on Monday.
Later tomorrow, higher concentration volcanic ash will approach Ireland and Scotland from the Northwest, as shown on the latter frames of the latest VAAC charts:
Met Office: Icelandic volcano - Zoom air ash concentration charts
However, winds will have backed into the Southwest during the course of Monday, so although some difficulties may occur for a time during tomorrow, Sunday, these should clear again on Monday if they are to occur and the airspace over Ireland should be clear until at least Wednesday, but probably for longer than that.