Hi Wayne Suen,
We are unable to comment on the tax requirements of Hong Kong.
If you arrive in the UK around November 2022, then this would fall under 2022 to 2023 tax year and the last date for filing the self assessment tax return would be 31 January 2024.
To determine if your are deemed resident in the UK for the whole tax year, you will need to review the statutory residence section of www.gov.uk.
This can be found at RDR3 Statutory Residence Test
If you are deemed resident in the UK for tax purposes for the full tax year, then you would declare your Hong Kong income in the self assessment tax return and and claim foreign tax credit relief up to the maximum of the foreign tax paid.
The main tax return has a tick box to show that you have used estimated figures.
You would have up to 2 years after 31 January 2024 to correct the tax return with actual figures.
If you are deemed not resident in the UK for the full tax year, then you would only declare any UK income arising since you entered the UK.