I have rented cars in HKG with a US driver's licence.
I am sure you can get a HKG licence, with your UK licence.
If not, they will give you say "90 days" to apply for one.
Get one of these "int'l driver's permit" from your autoclub.
Contains a page with Chinese language. Permit valid 1 year.
Good luck to find parking spaces.
xxx
Happy contrails