Passwords. Recently updated my two childrens' personal details including amending their emails. Think - wasn't paying adequate attention - the site said their email would now be their login name. Each received a confirmation email to click in their email account: done. Since then no combination of email/Exec Club Card number/ password works to get in to their accounts. One is constantly bounced straight on to the "are you trying to access an OnBusiness Account?" page. Even when clicking on the Lost password link !!!!

Any advice, please?