We've recently rolled out a new feature and we've discovered a small number of customers have been impacted when attempting to login to My Account.
Only customers that were not logged out of My Account yesterday morning (24th September) are impacted and may see the below error message when attempting to access My Account again. To resolve the issue, please clear your cookies. There are further instructions provided on the error page if you are unsure how to do this (see below). We apologise for any inconvenience this has caused and thank you for your patience as we resolve.