NC, seems like you have not followed the latest..... All sounds logic but that's just about to change thanks to the 49ers court case which woke up the UK IRD....
So, HKG tax, yes. UK tax, yes that as well..... Than after the year it's up to you to get it back....... (All if you are NON Uk resident or PART if you are..)
Not the rules, not normal etc but that is the way it is going per October 1st as it stands now....
Cheers