I moved to the UK on 30 July 2022. I have been unemployed for many years, and remain so till now. I have savings in the UK as well as overseas which generated interest income less than £10,000 in total during the tax year 2022-2023. I have no other sources of income during the year. Do I have to register for self-assessment and send a tax return for the tax year 2022-2023?