Just been speaking to an Aussie.

He goes to the Phils regularly and pays the equivalent of 34,000 PHP in AUS dollars for a return journey which is well over £500 if I'm not mistaken. This kind of price is from both Sydney & Melbourne with the cheapest airline.

Distances

London to Manila approx 6600 miles
Sydney to Manila approx 3800 miles

After doing the maths I'm baffled.