Air New Zealand Air Points - AKL-HKG-LHR - Where to buy duty-free?

I will be travelling AKL-HKG-LHR with Air NZ next month.

When going AKL-DXB-LHR or AKL-SIN-LHR, I buy duty-free alcohol at the intermediate airport, with no problems.

I've seen a few posts that say liquids are confiscated in HKG, even after going through security (secondary, jetway screening).

Can anyone who has flown AKL-HKG-LHR tell me if their duty free alcohol purchased in HKG security area has been confiscated prior to boarding their flight? I don't want to buy it and then lose it.

LHR duty free alcohol is not cheap - you can buy it cheaper in Sainsbury's supermarkets, so i shan't be buying at LHR.

i think you can give it to the boarding gate staff when you exit the plane or arrival at HKG then they give it back to you when you board for take off from HKG for LHR