It has been interesting with the different banks actually.
PTSB: Straight in to meet branch manager, approved in principle there and then.
Ulster Bank: Very good getting back to me and following up. Approved after first meeting. Also offer a 0.1% discount for salaries over 100k which is something I had never heard of before even though 0.1% isn't exactly a big discount.
AIB: Dragged on for about 6 weeks, dealing with multiple different people and just approved at last.
BoI: Good on phone but a bit all over the place in terms of getting approval but got it eventually.
And for them all you need loads of documentation and evidence of and ability to save seems to be the key thing for them all.