For security reasons you can only update your linked account online once every six months. To update your linked account online head to the Profile section of your account and scroll down to the linked account section. If you have already updated your account online in the last six months, please complete a “Change of details” form and return it to us by post or email. The form can be found here: Savings documents and forms. Alternatively you can call member services and update your linked account over the phone.