Bank Interest

[Dnomyar]

I received a letter from my bank in December 2018 telling me that they had failed to notify me of changes to my savings account since October 2014 and were paying into my account some additional interest calculated as the additional interestI may have been expecting to earn during the periods they believe I may not have been fully informed. they go on to state that the interest has been paid gross. No reference is made to this payment in the annual summary of interest I received from them for the 2018/19 tax year. Do I declare this additional interest in my 2018/19 tax return?

[Jholm]

Declare it in the year it was received, so assuming they paid it before 5/4/19, then yes...2018/19.

[maths]

On the basis that what is received is "interest" then it is taxable in the tax year of receipt.

In one case from the distant past I believe the judge said "receivability with receipt is nothing".... or some such phrase.