OK
There does not seem to be any reason at all for you to have given up your tracker mortgage.
Of course, we have not heard AIB's side of this story, but I can't imagine why you would ask them to or even think of asking them to give you a new mortgage.
There was no reason for AIB to ask you to do it either? Except to extinguish your right to a tracker.
Danske Bank did this as a matter of course because of their computer setup.
Some of their customers have complained to the Ombudsman as they were excluded from the Tracker Review.
The Ombudsman has reported that an unnamed lender has appealed on of his decisions on trackers to the High Court.
The High Court listing shows that Danske Bank has appealed a case to the High Court.
I strongly suspect that this is the issue on which the Ombudsman has decided.
So I think you should make a formal complaint in writing to AIB and ask for a tracker based on your 2005 initial mortgage.
If they refuse, then you could lodge a complaint with the Ombudsman.
Then keep an eye on the Ombudsman's published decisions or on High Court cases involving the Ombudsman and Danske.
Brendan