If you have added items to your cart and then proceeded to the checkout - only to find that your shopping cart is now empty - you probably need to clear the 'cookies' in your browser.

Why does this happen?

We recently moved our website to a new server.  Unfortunately, some people who visited our site while we had it hosted on a previous server may now experience some difficulty when they visit us again (now on the new server).  This is related to the 'cookies' - very small files that help the website to remember things such as what items you have added to your cart, and that you have logged in.

How can I fix this?

You need to clear your 'cookies' from your browser.

This article here gives instructions on how to do this in most common desktop and mobile browsers: