Hello Mermaid, I will try to help you a little,and I hope it helps you out ok.
I got married in the Philippines in May of this year to my filipina wife and this is what we had to do..... first of all you go to the registrar here in the UK to get your CNI but before you go you will need to know your girlfriends and her parents details,names etc,then all the details of were and when you are going to get married,then submit it to the UK registrar,this will take around 21 days,then you will have to make an appointment at the british consul or embassy in Manila to exchange it for the one you will get from the british embassy or consul, this has to be done to make it legal for you to married in the Philippines,then you and your g/f go to the registrar in the Philippines and fill in the marriage papers 10 days before you are getting married, you will have to be there for the 10 days but you can get married on the 11th day, so try to work out when you will submit the marraige papers then the marraige can take place anytime after the 10th day.
hope this is some help to you my friend and all the best to both of you on the big day

this is for getting married in the registrar, not sure about the church takes a lot longer in the church I'm told.....