I have a newly opened current account (Kroo) earning interest, and an attached to that - quick access ISA account, into which I plonked my £20K limit, that account also earns monthly interest, so it has already had some interest added to the £20,000. Does that interest count towards the limit, and would I need to withdraw it each month, or can I safely leave the interest in the ISA part of the account, please?

