Hi
The Banks will notify HMRC about the amount of Bank Interest you receive.
You can also write to HMRC with full details of the Bank Interest recieved during 2023/2024 - a full review will then be carried out and you will be informed if you owe any tax.
HMRC PAYE & Self Assessment,
BX9 1AS.
Please also refer to the following guidance -
Tax on savings interest
Thank you