Interest on pension lump sum

A client of mine has received a 25% lump sum along with interest received for late payment of benefits. Where would the interest on this payment be shown on the tax return, any suggestions?

H,

The interest is taxable and should be declared in either the box for 'taxed UK interest' or 'untaxed UK interest', which can be found on Page TR3 of SA100 or the equivalent online tax return boxes.

Thank you.