If you don't have an account with us already, you can create one during the process of placing an order.
Simply add the items that you want to your basket, and when you are finished, head to the checkout page. You will be asked for your email address:
Enter your email address, leave the "Do you have a password?" button at the default "No, I am a new customer" position, and click "Continue Securely".
You will be prompted for any other necessary information, such as your address, on the final payment page.