This website fulfils the requirements as set out by the World Wide Web Consortium’s (W3C) Web Accessibility Initiative and has been carefully designed to comply with the latest legislation, which is concerned to ensure the accessibility of websites to as wide an audience as possible.


It is possible to increase (or decrease) the size of the text in the pages by using the font size controls integrated in your web browser. Web browsers do this differently, but in general you should look at the options in the browser’s ‘View’ menu, failing which, consult your browser’s Help documentation.


This site fully complies with the latest web standards:

vcss valid-xhtml10-1


In order to provide good accessibility some compromises have unfortunately had to be made in terms of full support for certain older browsers which do not support web standards, or support them unreliably or unpredictably. We strongly recommend that you use only the following browsers:


  • Google Chrome
  • Mozilla Firefox
  • Internet Explorer/Microsoft Edge
  • Brave
  • Netscape
  • Opera

Apple Mac

  • Apple Safari
  • Mozilla Firefox


  • Mozilla Firefox

The following browsers are not recommended on any platform – they will show the website but may not display the pages optimally:

  • Opera (Mac or PC, any version before 7)
  • Netscape (Mac or PC, any version before 7)
  • Konqueror (Linux, any version)

We appreciate that it might not seem easy or desirable to have constantly to upgrade your browser! If you do have an older browser, or one not on the list above, and you are unable or unwilling to change it, rest assured you will still be able to use the site, but you will not have the best viewing experience. Additionally most accessibility enhancements will not be available to you. Netscape 4 users may only view the site in text-only mode. We therefore again strongly recommend you upgrade your browser. If you’d like to read more about why this is a good idea more generally, visit the Web Standards Project.

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