OK, if that is correct info can you ask your informant where the A330's were being (line) maintained before the date of commencement of the 20 year lease of Hangar 6?
EI have an A330 size hangar in SNN which is used nearly every day. But we are all only too aware that EI want out of all A330 operations in SNN so the requirement for a large enough hangar in DUB to carry out their A330 maintenance. Hangar 6 is the only one in DUB large enough.
C check maintenance for EI A330's is currently being carried out near Dinard in Brittany, France.
It seems to me that MOL is throwing his toys outta the cot for the laugh. There's no true reason for FR to have H6 when there are more than enough other vacant hangars around in DUB. That aside he was asked did he want it back in November and he declined the opportunity. EI were asked in December and they took it. So I reckon it's more a case of MOL not using his noggin' and doing what EI are rumoured to be doing with it. (transfer their hq offices to there as well)