In fairness, I rang the Revenue in December and they were able to tell me exactly how much TRS I was entitled to, how much my mortgage should drop by etc etc. I rang again in February, and they confirmed that they had sent all the relevant updates to the bank for processing.
When I rang the bank in February they confirmed that they had all the new data and that they were integrating it into their systems! They initially advised that all would be sorted by April/May, but now its Aug/Sept!!