Originally Posted by
Ldnn1
Welcome to the forum, hkstudent.
Yes, assuming this is for one person not two, you could apply it to the mixed cabin and it would be 19,500 + 39,000. You can book this online on avios.com
Note however that you may find it better value not to use the voucher for your outbound and instead just for the inbound - it'll cost more avios but will save you a good chunk of YQ. You'd have to call to make that booking though.
So it can be used for separately for one leg on 2 return flight bookings?
The reason why I avoid to do CW on ex-LHR leg is to avoid horrible YQ and also massive APD, which HKG at least have good saving on YQ (not airport duty + 3rd runway surcharge)
Also, premium immigration lane is something very important for a early flight to LHR though (unless I take the earliest BA flight from HKG)