Hi,
You will need to review article 14 of the UK / Hong Kong tax treaty. It advises that you are taxable in the UK on your employment income from Hong Kong, because you are in the UK, not Hong Kong, when you do this work.
Hong Kong: tax treaties
The SA102 should show your Hong Kong employment and, where tax is paid in Hong Kong, you also declare the income and foreign tax deducted and claim a foreign tax credit.
Thank you.