Hello,
I'm an Italian guy living and working in the UK.
I met a Filipino girl studying in UK, but now she's back in RP.
I'm planning to go and visit her this summer, but I also would like to know:

since she is still married with a Filipino (even if they dont live together anymore), is a legal separation enough for her to obtain a fiancée visa for UK?
Could she marry me here in UK with just a legal separation in the Philippines?
Do you know anything about Guam? Could she marry me here in UK with a divorce/annulment obtain in Guam, and would she be granted a fiancée visa?

Thanks in advance for any reply.