Please use example.(com/co.uk/org) to discuss hypothetical domains. The "example" domain does not exist and cannot be bought. It is reserved for this purpose of using a domain name that no one owns.
If you can visit both example.co.uk and example.co.uk/index.html it
is a duplicate content issue with Google. You might also find more instances of duplicates such as:
http://example.co.uk
https://example.co.uk
http://www.example.co.uk
https://www.example.co.uk
http://example.co.uk/index.html
https://example.co.uk/index.html
http://www.example.co.uk/index.html
https://www.example.co.uk/index.html
...all showing the same content if you do not use a canonical 301 to declare the location of your content. If your site is hosted on an Apache server, this is usually done in your .htaccess file. (though drag and drop sites might offer other tools.)
BTW - This is not a discussion for the Google SEO and News forum, it is covered in our Apache forum: [
webmasterworld.com...]
If you search here for a term like "canonical redirect" you can find examples (thousands of them).