I have travelled on the HKG-LHR route few times a year, and it is quite nice. However the seat design has its problem. You won’t want to seat on the same thin cushion for 12 hours as it hurts! I can’t actually sleep on the seat because it is so bad that I usually sleep on the table, strange. Entertainment choices are fine, enough to spend the whole time. F&B quality are just good as other CX flights. Can CX move out from T3, the walk is too long!