Aviv Shany

Hello, I'm a tax resident in the UK and have received interest income from a savings account in a foreign country in the past tax year. In that country 20% tax rate has been deducted at source by the bank, while I'm in a higher tax band in the UK. I have two questions on this: 1. Is it possible to account for the tax that was already deducted at source (assuming the countries have a tax agreement) and only pay the remaining 20%? 2. How can I report it in my self assessment tax return? Thanks!