If you receive the above message when visiting your site it probably means you have not forced the server to use HTTPS.

To check if there is a valid SSL certificate installed for your domain:

https://www.sslshopper.com/ssl-checker.html?hostname=joomwalker.co.uk

In Joomla go to System > Global Configuration > Server and Change Force HTTPS to entire site

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The Joomla name and logo are used under a limited license granted by Open Source Matters the trademark holder in the United States and other countries.

Lancaster