Are you sure you want to commit yourself to go to Philippines with £100 in your pockets...???
Do you seriously think that this paltry amount will pave the way for the miriad of different expenses that will raise their ugly heads whilst over there...?
A bare minimum for that lenght of time should be at least £1000, and a visa card for emergencies.
I don't know who has been advising you, or cajoling you into making the trip, but something doesn't add up at all.
All I can say is ... Good luck.
