This website has been designed to be as useable and accessible as possible across a wide variety of user-agents. This has been done by using XHTML (eXtensible Hypertext Markup Language) and CSS (Cascading Style Sheets) and it conforms to current Web Accessibilty Initiative (W3C WAI) guidelines.
For users with visual impairments, if using the latest browser versions with ‘text-zoom’, text-size can be increased by holding down and scrolling (at the same time) the wheel of your mouse.
All content images on this site are provided with descriptive ‘ALT’ or ‘TITLE’ attributes. Where images contain important information, such as graphs and charts, alternative information is provided in the form of inline descriptions (‘LONGDESC’) of tabular data.