Hi,
On the basis of the info provided, you should register for Self Assessment (on the grounds that you receive foreign interest) and apply for Split Year treatment. The UK part of the year would begin on the date you arrived in the UK. When completing your Self Assessment tax return, you should only declare income received between the date of your arrival and 5 April 2023. Any income earned/received before you arrived in the UK does not have to be declared. See link below:
Tax on foreign income
Thank you.