I would recommend loading your mahal card with some cash, that would come in handy too. If she has access to a PNB global Filipino card, it can have peso on it easily. And you can send remittance on it from a fee of £5 only. That could be an option before you go. Bare that in mind.
http://www.pnbeurope.com/GFMC.htm
Also , since you like your cereals, I was the same, I missed my regular one first thing in morning! Nestle are king in the Philippines, so there's no Kellogg for ya. Milk is fine I would recommend the New Zealand stuff though. I had Chinese milk as used by cosmonauts. Yuck, tasted like wallpaper paste. Never again.
Also if you can get Fiji apples, they are the best on earth. I wish I can get those again.
