Saving interest/Dividend income before entering UK

Dear HMRC, I am from Hong Kong. I got the BNO visa in Jun-2024 and entered the UK on 24-October-2024. I have some questions regarding the tax assessment for 2024/25: 1) saving interest/dividend income/capital gain before 24-Oct-2024 to be taxed? 2) if not, when do the cut-off date for other sources of income to be 'taxable' as I am currently not a UK tax resident by definition Thank you very much.

Hi,
If you qualify for split year then you only report any foreign income for the UK part of the year:
RDRM12000 - Residence: The SRT: Split year treatment
If you do not qualify then you will need to report all your foreign income to the UK:
Tax on foreign income
The guidance at RDRM12150 will help you work out if split year treatment applies.  
Thankyou.