Hi Gary, (little finger) To add on your list of documents is a letter from the company you are working (might the other members will say that is no need) but its obvious here that the more documents u can show to the ECO the more u will have the chance to get fiancee visa
AS for your passport and birth certificate, u need to have it certified by a solicitor ,about the bank statement and payslip,u need to send it original copy and let your fiancee photocopy everything here in Manila
about worrying lost documents,my hubby sent all his original documents using this
http://www.interparcel.com/ (DHL) recommended by IainBusby its very reliable,no need to worry lost documents