user has jQuery
when I disable this CSS file (Book-card.css), then cards are displayed,so the problem is related to that file (and maybe also elsewhere)
Other
in addition, this file is missing http://constructionskillcard.co.uk/script.js
it probably has this (down) defined in it which is currently causing the problem about $
(the plugin with that “name” is missing)
Upload ALL again and make sure that all scripts and other files are in their place
For uploading (instead of monstaFTP) it is best to use the FTP client mentioned in this article