I arrived in UK on 14th March 2005. Intend to apply for naturalisation on 15 March 2010, but, my passport was stolen on 17th august 2007. I flew back home to zimbabwe on an Emergency Travel Document, on which I was issued a new visa with Indefinite Leave to Enter. I only have copies of my old passport, and on the copy there is a very clear stamp on the day I arrived, 14th March 05. Will NCS accept this? Otherwise only other proof i have is my first payslip dated at the end of April 2005. Do I have to wait an extra 6 weeks to apply for naturalisation?
I do not have a police report for my stolen p/p, just a letter from police confirming it was stolen, and a police report number. Do I have to have the actual police report, or will the letter be enough? Only reason i don't have it is my sister filed the report as it was her handbag that was stolen, and she lives back in zimbabwe now. Police said I needed forms of her original id to get the police report.
I am worried my credit history will affect my naturalisation. I've got a very, very bad credit rating!!

sorry about all the questions! any help and advice appreciated!