Sainsbury's Online Shopping
Enter ID and password and then they send you a 6 digit code by email. So you then have to logon to your email, get the 6 digit code and enter it in the Sainsbury's logon, only then does it go through to your account.
What an annoying mis-improvement to implement. It is however a very secure measure to bring your email into the equation, anybody can get into your account if they have your ID and password or complete a captcha. But they cannot get over your email.