The XHTML and CSS links that appear at the bottom right of every page indicate that this site has been constructed so that it conforms to technological standards as defined by the World Wide Web Consortium (W3C), the main international standards organisation for the World Wide Web. This ensures that the site will render correctly and consistently across the major browsers.

The W3C XHTML 1.0 icon denotes that the XHTML code within the page conforms to a document standard as defined by the World Wide Web Consortium. You can check this for yourself by clicking on the icon (opens in a new window) which will run the page through a validator on the W3C website.

The W3C css icon denotes that the Cascading Style Sheet definitions used on the web site conform to standards as defined by the World Wide Web Consortium. You can check this for yourself by clicking on the icon (opens in a new window) which will run the css file through a validator on the W3C website. Cascading style sheets are used define the presentation and layout of web pages.