SRT and Split year

I will be arriving uk on 15 Aug 2023 from Hong Kong and will become a tax resident for the year 23-24 (having stayed in uk for more than 183 days). I was never a uk tax resident before 23-24. I would like to rent a house in uk and enter a tenancy agreement before I arrive on 1 July 2023. However I will only start to stay in the house after I landed in 15 Aug 2023. I still own a flat in Hong Kong (my original residence) after I have arrived in UK. I do not have other ties before I arrive in UK. If I would like to consider split year treatment for my overseas income by case 8, will the UK part of the tax year start on 1 July 2023? Or on 15 Aug 2023? Thanks.

Hi,

In Split Year Treatment scenarios, the UK part of the year is regarded as beginning on the day an individual arrives in the UK.                                            

You can find more here-

RDRM12030 - Residence: The SRT: Split year treatment: When will split year treatment apply

Thank you.