"Chopper - there used to be a system at BRNC where if you'd done all 3 years at an URNU, and were recommended by your CO, you would only do 2 terms (instead of 3). It was scrapped, I've no idea why"
That was about the time I went through there - a lot of the Cdts were either not that great in reality, or failed to live up to expectations. Others felt that they wanted to do the extra term and felt under pressure.
In reality the scheme failed to deliver due to a lack of a coherent URNU syllabus, which could be fixed - e.g. join URNU, do AIB end yr1, if selected then do some form of more fixed syllabus which replaces elements of BRNC and then subject to passing some stringent tests on arrival then fasttrack.