plus side is
a wedding in the phils is a lot cheaper than the UK.
if you marry in the phils and apply for a spouse visa, your fiancée shouldn't need to apply for FLR in the uk, saving you nearly £500.
also saving you the hassle, time and collecting evidence of applying for FLR
also once in the UK she can look for a job and start work straight away, while on a fiancée visa she can not start work until your married and she has FLR ( could be from what 2 months upto 9 months wait , depending on when you marry and how long it takes to process the FLR) so if you was on a spouse visa and she was lucky to find some work in a month instead of having to wait for flr.