I'll be flying LHR-HKG in Y in 2 weeks, and I have been told that I have 30kg allowance. Knowing that I might have a lot of stuff to carry, I have been trying to increase my baggage allowance without paying. I called MPO, the CSO told me to redeem a voucher with miles. Then I called CX res, the answer was a straight no.
This is the first time in years that I will be taking excess baggage with me, so any tips on how to avoid being charged for excess baggage? ^