Thank you for replies, really blows me away when people take the time to help.

fairestcape, I'll check our SSL certificate, my MD who actually bought it, is under the impression that it IS minus the www, so that could well be the problem..

mprough, I noticed the same things when checking the source code. So I've now switched off the skype sidebox and the box that contained the shopmania link. Cant for the life of me figure out where that bit of javascript's coming from:

Code:
<script language="javascript" type="text/javascript"><!--
function session_win() {
  window.open("http://www.sourcetech.co.uk/shop/index.php?main_page=info_shopping_cart","info_shopping_cart","height=460,width=430,toolbar=no,statusbar=no,scrollbars=yes").focus();
}
//--></script>
So I'll take a better look at that asap.

Question.. if there are ANY hard coded links on the site, even to external sites, then this will cause issues with HTTPS? How do I get round linking to say http://www.google.com, when there isnt an HTTPS alternative?