Thanks for that, it's appreciated. The request is just to affect unwanted IP's. I still want any good IP's that have just typed in the wrong address to get a 404 and then redirect to the home page after a short message to say that they will be redirected to the home page in a few seconds. Does what you suggest affect that at all please?
The 404 ErrorDocument should be served at the originally requested URL, should return a 404 HTTP status, a plain text human readable error message, and optionally some clickable links to related content.
It should not "redirect" anywhere, especially not to the home page.
Thanks for the info. I'm getting a little confused as I feel a little out of my depth here ;-( I know on one of my sites, if a user types a wrong url into the address bar, it takes them to an error page, then after 5 seconds, it refreshes them to the home page.