It might be a good idea to check flights from Manchester & Heathrow to Manila and promo flights onto Cebu. Could save you a few quid. It might seem like a lot of hassle but I went from Birmingham - Heathrow - Kuwait City - Manila - Bacolod - Sipalay in the space of a few days just stopping overnight in Manila.

Also, I find the prices of flights tend to go higher around two months before the time you want to go.