I wondered where they had gone, I dont understand the logic of flying to an alternate that is the other side of the Irish Sea. Surely it would make more sense to stay on the mainland just in case the flight has to terminate there.
The front runs north south so the weather just to the west (ie Ireland) is significantly better.
the Glasgow short TAF
120912Z 121019 06008KT 1000 SN SCT003 BKN010 TEMPO 1013 0500
+SN VV/// BECMG 1113 3000 RASN BKN005 BECMG 1417 -RA -RADZ
PROB30 TEMPO 1519 6000
So I'm not sure it will be a long reopening.