well u can still try to get her a tourist visa to see it for yourself... i think it will cost you less since you dont have plans to get her fiancee as you dont believe in getting married right away...and it cost 500 quid now the settlement visa fee vs. tourist visa. who knows? you would still be getting same chances in both visa you might be granted or might be not...
but you have also talk it over to her...people here is suggesting you get her a fiancee visa for there's a higher chances she could come in england...and have 6 months with you...for the reason that you can marry her and within that time and if you dont then she has to go home... as there is also one case that they applied for a tourist visa then decided to marry and thought they can convert it into marriage visa without going back home...but as long as she knows the plan and if you will just explain to her your point....that you just do it for you to spend some months together living...and find out what your heart really wants from her...then at least she knows where she stands if she agreed on that i mean theres nothing wrong about it if you decided not i bet if she ever gets back in the phil and by the time you decided you wanna spend the rest of your life you can still apply for a fiancee visa...or you can marry her in the phil...or for a safer way is that why just not visit her in the phil and get to know her by talking online...at least your not gonna break's someones heart if you cant marry themand another thing is not to waste time and money and chances...