Improving the accessibility of our website helps to increase the number of people who can access this information. If you have any difficulty accessing any of our online content please contact us.

Browser compatibility

This site has been developed and tested in several internet browsers including Internet Explorer 9 and above, Firefox, Opera, Safari and Google Chrome. This site may not work to its full potential for users of Internet Explorer 6, 7 or 8. We very much recommend upgrading your internet browser to a more recent release.


All images used in this site include descriptive alternative text.

Cascading style sheets

This site uses cascading style sheets for visual layout. If your internet browser does not support style sheets, the content of each page should still be readable.