One of the requirements they ask for is proof that neither my girlfriend or I are married. She has a CENOMAR however I have no official document to say im not married. Is there a simple document or some kind of proof they will accept without having to get sworn affadavit's etc through GOV.UK.
Your girlfriend can get a CENOMAR for you too, if fact you need it. This confirms that you have not married in the Philippines before. You also need an Affidavit of singleness (template on Gov.UK) to cover UK. Or/and divorce paper
The affidavit you can very easily get Notorised locally. I had to do all this in Jan/Feb to get married in Manila