In order to upgrade to premium membership and extras, simply log into your account and follow the 'Upgrade' link shown.
You can pay online by credit card or debit card. The site will then direct you to a secure payment site where you can enter your details.
How long before the upgrade is active?
Once you have entered your details, the page will confirm whether or not the payment has been successful. If successful, your account will be upgraded straight away for the duration specified. You will need to log out and then back in to active the upgrade.
Already a Premium member
If you are already a premium member, the site won't let you upgrade again to premium for obvious reasons.