You are entitled to the full personal allowance for the 2022 to 2023 tax year, and you can use any unused balance against your overseas interest.
UK residents with foreign income or capital gains must complete a Self Assessment tax return, unless your only foreign income is dividends, and your total dividends, including UK dividends, are less than the £2000 dividend allowance. You can see more information here:
Tax on foreign income
Check if you need to send a Self Assessment tax return