You can edit your name and address by using the My Account section. Log in as normal, click the My Account link at the side of the screen, and choose 'Change my Details' to update.

My Account also allows you to update your 'Payment Details'. You can also change your email address and password here.

To update your payment details, you will need to select Change my credit card/direct debit details and this will take you into the payment screen.

Please note that you are unable to change your username once registration has finished.