If you want to change or update your information, log in to your account and click Settings in the "Personal Information". There you can change your information. You also have the option to change your user data free of charge on 0800 MEASUREMENT (0800-6377864). In addition, on a regular basis - about every 6 months - rather than an update of personal data. You are to contact our Call Centre or by logging onto your account using one form invited to verify your information.