What I feel is...of the 6 apartments of the same size and style to mine in my block, mine was the last one sold, over 2 years ago, so even I can't put a real 'today' value on it, and aside from my opinion of whether what I bought was different to most in the area and has its own unique draw, I can't understand the bank throwing a random deduction on the value based on national or regional averages.
How would I do a LTV realistically? Compare the percentage drops on other dissimilar apartments in the same block or locality...I can try but its hard to say what things sold for recently, people don't generally want to say!
Aside from all that, I'm not going around in circles because I am curious how indexed ltvs work, and I still haven't gotten an answer yet (though I appreciate all replies)