Ah, it looks like there is a problem with the certificate for www.alakazam.co.uk. When I try to connect using Firefox, I get the same message as you:
The owner of www.alakazam.co.uk has configured their web site improperly. To protect your information from being stolen, Firefox has not connected to this web site.
This is a completely separate issue to the "Connection is not Secure" message that you see when clicking on the "i" in Firefox on sites such as ebay.co.uk however, which as I mentioned, is solely because the site uses http.
Edited by Al1000, 13 April 2017 - 06:41 AM.