Last time we flew to Manila from LHR in Jan 2018 it was hell. We flew Singapore Airlines, who previously (2011) had been excellent. Wow, they were truly awful. Not only were the economy seats very cramped, but the service was awful and we got ripped off badly when we had to return a few days early due to the death of a good friend. Made a couple of decisions after that trip 1) I'm not flying economy again. 2) I'm not flying Singapore Airlines again. Anyway...
Now looking for other options and I'm open to ideas and suggestions. What travel hacks do you use to get Premium Economy or Business class flights from LHR to MNL at reduced rates? Obviously, it would be nice to avoid paying full whack if possible!
Do you try hacks like taking a short haul out of LHR to reduce taxes and then take Premium/Business long haul to MNL? Do you bite the bullet and go Philippine Airlines directly? Anyone here flown PA direct to Manila from LHR? 
All suggestions and ideas welcome!
My daughter and son-in-law used Emirates last year. EK 306 Newcastle to Dubai, EK 338 Dubai to Clark.They booked 5 months in advance, paid just over GPB 1,000 for both, round trip including taxes etc., etc. and had 30 kgs baggage allowance each.
They were well pleased with the food, the seats and the legroom (he's 6'2") in economy.
Flight EK 338, DXB - CRK, was via Cebu/Mactan with about 30 minutes on the ground there. It was a "round trip" sort of flight. DBX - Cebu - CRK - DBX.
All the flights were on time, with only 3 hours between flights in Dubai coming this way and about 6 hours going back.
They are seasoned air travellers and gave Emirates top marks on this route. They plan to fly Emirates to CRK again next year.
Hope this helps.
Peter