Originally Posted by
UKtravelbear
The tax is called Air Passenger Duty.
And you wouldn’t have had to pay any additional APD because the rate in Upper is the same as it is for Premium.
Thank you for the clarification! The other nice surprise is that my partner and I have only been deducted 25k pp from our accounts for the r/t upgrade. This is likely a happy mistake, so I wouldn't count on it...and maybe the points might still be deducted.