Accessibility & Help:



This website contains several features to help improve the quality of your visit:



Website features for visitors with web access disabilities:

This website adheres to the guidelines of the international Web Accessibility standard WCAG 1.0 Level-A. Compliance to the Level-A standard was implemented in August 2007.

Website features for visitors with reading difficulties:

This website is speech-enabled. This means that you can listen to the words on the site as they are read 'out loud' by your computer. This is useful for people who have reading difficulties, mild vision disabilities or for whom English is a second language. This service is free to everyone. To use it you must do the following:

  • Download a program called BrowseAloud .
  • Point at the website text you want to hear with your mouse.
  • BrowseAloud will then read the text 'out loud'.
  • To ensure you can hear the sounds, make sure your computer has sound capability and that speakers or headphones are plugged in. You will also need to ensure the volume is turned-on.

BrowseAloud Logo

If you wish to learn about BrowseAloud or have queries about its operation, visit the BrowseAloud website .



Change the size of the text on this website:
If you find the text size on this website is too small to read comfortably, you can change its size. You can also change the size of the text in the following ways (Please note that the way that you do this depends on the browser (i.e. the software program) you use to view the web).
- Some computers allow you to change text size simply by holding down the 'control' or 'alt' keys and using the wheel in the middle of the mouse to make the text larger and smaller.

Microsoft Internet Explorer: If you are using Internet Explorer, go to the menu at the top of the browser window and select View, from the list of options, select Text Size. You will see a side menu open up; select the size you wish to view the website in.



Firefox (Mozilla): If you are using Firefox, go to the menu at the top of the browser window and select View, from the list of options, select Text Size. You will see a side menu open up; select the size you wish to view the website in. Firefox also allows the text size to be changed with keyboard shortcuts:
Press Ctrl and + to increase the size
Press Ctrl and - to decrease the size
Press Ctrl and 0 to go back to the default size

Netscape Navigator: If you are using Netscape Navigator the text size is altered via keyboard shortcuts: Press Ctrl and + to increase the size
Press Ctrl and - to decrease the size
Press Ctrl and 0 to go back to the default size

Apple Mac (all browsers): Press Cmd and + to increase the size
Press Cmd and - to decrease the size
Press Cmd and 0 to go back to the default size



Website features for viewing animations, videos, documents and other content:

While the vast majority of content on this website is available as plain text, some has been published in different formats. This is because certain information can be better demonstrated in other ways, e.g. video.

Content like this often requires the addition of a small piece of software (called a 'plugin') to your computer. The plugins used by this website are listed below. They are made by very reputable manufacturers, so there are few risks to your computer. In fact, some of them may already be installed on your system.

Download Adobe Acrobat PDF Reader
Download Macromedia Flash Player
Download Apple Quicktime
Download RealPlayer
Download Microsoft Media Player