Originally Posted by KhemaneyBoy

I'd suggest calling CX and taking 30C or H (reserved for DM). I would assume it's a full flight, in which case, you'd rather be in a bulkhead seat.

I have flown PEY between HKG and LHR plenty of times on both A359 and 77W. I've always been able to rest better, and generally found it far more comfortable whenever i've ended up sitting on 30 A/C/H/K.