The report will state the facts of this sad event when it comes out.
I looked at the thread to see if the RVR went above CAT 1 minimums while they were there.
It's a long way from 375m up to 550 or whatever the CAT 1 min RVR is at Cork.
Did it get good enough to attempy a CAT 1 (3 times!) or didn't it?
If it didn't, then clearly the approach ban was in force and they should have been holding or diverting.