I have installed a SSL on my site and added the text to the bottom of .htaccess. This worked for a few hours and then the site reverted to not secure. I checked the .htaccess file and the text had gone. I re-entered the text and saved the changes. The site then displayed as secure with a padlock, again after a few hours the site shows as not secure.
I saw some LSCACHE related entries, which I’m quite sure are created by a (misconfigured) plugin, as we don’t run LiteSpeed servers or LiteSpeed Cache.
Thanks everyone for your help. It looks like I have solved the issue. I use Wordpress and in settings/general, I changed the URL to https and the problem seems to have been solved