RossMitchell,
You are a star! I worked out where the Admin sectionw was and scrolled until I found file names that sounded relevant and hunted down to links that still referred to the old urls. I’ve changed them and it now appears to be working. Thankyou so much for taking the time to reply.
Thanks RossMitchell,
I added those 2 lines to the wp-config.php file (through the file manager of our webhost) and now when I clck on a link, the content appears at the bottom of the page, instead of a 404 page not found error. However it still looks awful as if the theme is completely missing. I’ve been unable to find where to log into wordpress to see whether the settings are ok. It’s no longer sitting as an option at the top of any of the web pages.