The ILS for 10L seems not to be fully commissioned yet. When there is low visibility and the !0s are being used, they revert to single runway operation using just 10R. There are predictable results in terms of delayed departures and arrivals having to hold.
I realise that a lot of work may be needed before CAT III can be used, but are the delays at DUB inordinate? I can see there may be buck-passing between DAA and IAA when questions are asked about this.