It looks like your folder directory structure was updated on the site as well.
For instance on the drawings.php page on line 66 you have:
include('/home/fhlinux134/k/katharineedwards.co.uk/user/htdocs/gallery/galleries/ribbon_fullsize_lightbox/index.php');
but the actual file is located at:
/home/linweb44/k/katharineedwards.co.uk-1089853359/user/htdocs/gallery/galleries/ribbon_fullsize_lightbox/index.php
A good solution for this is to use a relative path instead and update that line to:
require('galleries/ribbon_fullsize_lightbox/index.php');
It is likely that solution will work for all of the pages and sites where it isn't working.