The requested domain name is not configured for any web site:
http://www.elitecontrols.co.uk/KenticoCMS_3.1a/CMSPages/GetCSS.aspx?stylesheetname=CorporateSite
If you're an administrator of this site, you need to go to
Site Manager -> Sites
and use the following domain name either in the Site properties or add a new domain alias:
www.elitecontrols.co.uk