If someone was to accumulate a small amount of interest from a bank account and therefore this interest needs to be discharged.
Would it be possible to give the interest money to a charity such as Cancer research, Unicef , etc, obviously with the intention of getting no reward as its interest money.
I would be grateful if you could confirm if this is permissible.
Yes, that is the correct way to discharge that money.
Allah will reward you for your good intentions. Wassalam