Thanks guys. This is very reassuring
.
I only flew Cathay once in J from Singapore to Bangkok and the service on the A350 was one of the best I have ever had.
I often use the lounge at LHR T3 but excited to enjoy the offering in Hong Kong.
Last question regarding upgrades. I am assuming economy tickets aren't upgradable. I am tempted to book us with avios in J on the leg Hong Kong to Bangkok. How would that be seen if we are double booked? Thanks