thank you for your reply. it is really helpful. I came to UK on 26/7/2009 under Tier 2 (general), expired on 30/6/2012 extension on Tier 2: May 2012, expired 1/6/2015 Change to Tier 4 student visa in September 2013, expired on 31/1/2018 Extension on Tier 4: 11/8/2017, expiring September 2019 No gap ...

Are there any financial requirement for ILR (long resident) route?
The HO did not request any mandatory financial proof. But my employer said it is £35800 annually and because of this, it is delaying my application as I can only reach the above threshold next month.

For the documents, it is really confusing what I should put other than the mandatory documents.
I have seen a lot of people put bank statements and proof of addresses. How long of duration I should cover for?
Any other kind of "must" after the mandatory documents?