Must all be relatively new rules as I certainly did not do anything with my uk police clearance accept hand it in with my application..(6 years ago)but first thing is notary public stamp and remember return post fees for legisation office and also remember return post fees for Philippines embassey London.
We had just sold our house so no problem showing income..
The RP Consul did tell me that he had never heard once of a refusal from the UK.