Hey Roy,
I applied for my FLR on 1st August and received it back on 9th August. I got the initial HSMP for 2 years. I submitted the following:
1. 1 passport (I am unmarried

)
2. 2 photgraphs
3. FLR form
4. Covering letter
5. 4 months wage slip
I did not submit any bank statement and called up HO guys twice just to clarify whether we need to submit both the Bank statements and the wage slips. They assured either will do. Also, I asked them about rental/mortgage deals but they hit back at me and asked me to review whether it has been mentioned in the checklist
However, I have seen messages in this forum where people have submitted many documents. In a nutshell keep it simple.
Hope it helps rather than complicating things
