This bit of code sends everyone to the same address whatever they used (http://fiddyp.co.uk goes to http://www.fiddyp.co.uk, also redirects .com addresses to the .co.uk one)



if ($_SERVER["HTTP_HOST"] != "www.fiddyp.co.uk") {

  header("Location: http://www.fiddyp.co.uk");

pretty sweet little function, put it in your header and google wont think www.you.com is different from you.com and penalize you for having duplicate content.