They are just waiting you retire so that you will be confortable going to Manila to terminal 3... Alfonso is taking care of you.
But you will be able soon to go to Manila is an A380 (at least for a part) from Heathrow:
From March 18 via Singapore Changi airport (Singapore Airlines)
From December 1 via Dubai (Emirates)
But don't dream, it will be only for the 1st leg, not the second one going to Manila (or Cebu).
And Cardiff-Wales airport, capable of A380??