Kerr and King online store issue

Kerr & King are having issues with their online store.

From their website:

We’ve been having some problems with our ‘view basket’ button in so much as it has been showing an empty basket with the wrong title bar. I’ve been banging my head against a wall of code for the past couple of days to no avail so I have, for now, removed the buttons from all the pages until I manage to get it sorted out. Have left the one in the sidebar so I can continue to test my efforts.