As most people have said its best for her to go back to Philippines then to marry her there, your situation is very much like mine. Cause my wife was overstayed in Japan by 2 years. So the only way for us to be together was for her to return to Philippines. But she had heard that if she surrended her self to the immigration police then the boarder of immigration will be lenient with her and give her a certain amount of time to get back to Philippines without detaining her in an immigration prison. In our case it was 2 weeks to get back. I'm pretty sure that the British immigration aren't that much different to Japanese system.

Were now married and shes here next month So the futures bright for you too.

I think if she went back now and handed her self in she would be deported with in a matter of days or weeks, then you go out over there to marry her which will take about 11 days, cause you need to give 10 days notice to the registry/city hall in her area to marry her, also you will need to convert your British cni to a Philippine version which took us 15 minutes at the British Embassy. Then the rest is sorting out a wedding if you go down that route like reception, brides dress etc, etc. Then wait for your marriage contract, BUT, heres the but, we didn't wait for the marriage contract on nso cause we knew its takes months to get, so we applied for a secpa which took 2 days. Secpa is a certificate notifying that your marriage contract is being processed. So we used that to apply for the entry clearance spouse visa along with a 500 page supporting documents which took me 3 months to sort out but this was done before I went out to marry her, believe me its worth doing the supporting documents before you go and marry because in the Philippines postal system is so slow. Your better off carrying it with you on the plane so when you guys are married you can apply for a spouse visa asap.

I'm sure you and your love will be together within the space of 4 months. Which sounds long but it will all be over soon and you can be with her forever. Also you will get to see Philippines which is great.

Basically just do it by the book dont skip a few pages.