Electronic Documents (Banks and Bank Holding Companies) Regulations 

6 (1) An addressee may revoke their consent in writing, in paper or electronic form, or orally.

(2) If the addressee revokes their consent, the originator or the person acting for the originator must, without delay, provide the addressee with confirmation, in writing, in paper or electronic form, of the revocation specifying when revocation of consent takes effect.

(3) If the originator or the person acting for the originator provides confirmation in an electronic document, the electronic document must be accessible to the addressee and capable of being retained by them so as to be usable for subsequent reference.