Income from Hong Kong Government

I was a civil servant in Hong Kong and I moved to UK in late March 2023. I became a UK tax resident starting from 6 April 2023. After I arrived the UK in late March 2023, the Hong Kong Government continued to pay salaries to me for my accumulated annual leave until 14 August 2023. Thereafter, I do not have any other employment income. Before I arrived the UK, I have proceeded tax clearance in Hong Kong and settled. (Included the above-mentioned salaries from April to August 2023 in taxable year 2023-2024.) As there is a double taxation treaty between the UK and Hong Kong, do I need to declare this oversea income in the self assessment tax return and pay tax for this income?

Hi
This income is only taxable in Hong Kong, so does not need to be included on a self assessment tax return.