All content produced for publishing on this web site is designed and constructed in accordance with the World Wide Web Consortium’s Web Content Accessibility Guidelines.
Accessibility statementWe have endeavoured to make our site as accessible and usable as we can for everyone.
Although the site has been designed to be usable “as is”, you may get the most accessible experience of using this site by customising your computer to your individual needs (for example to install assistive technologies, get the site spoken to you, change its colour-scheme, or increase the size of its fonts).
Limitations of this site’s accessibilityAlthough we are working to ensure the site’s accessibility, you may find some limitations:
- while we always aim to communicate clearly and as simply as possible, some of the content may require a reasonable level of technical understanding due to its technical nature
- while the site has been created using the most accessible formats we could obtain, the site may still have limitations and we would value your feedback so that we can make improvements or provide the information to you in another form.
Access KeysThis site uses access keys as an alternative to mouse navigation. The following are the access keys used throughout the site.
1 = Go to home page
2 = Skip to Content
3 = Skip to Main navigation
4 = Skip to Search
The method for using access keys depends on the type of computer you have and the web browser software you use. In general the following combination of keys is used:
- On a PC using internet explorer - 'Alt' + <access key>, then 'Enter'
- On a PC using mozilla firefox/netscape - 'Alt' + <access key>
- On an Apple computer - 'Control' + <access key>
Skip LinksThis site has 'skip links' which enable a user to navigate to various areas of each page. These links can be utilised by pressing the tab key.
Semantic mark-upWebsite pages have been generated using a logical mark-up structure. This improves the browsing experience for all individuals, including users of screen readers and other assistive devices.
Changing the size of text
- In Internet Explorer go to the View menu and select the Text size option, then the size you prefer
- In Firefox 1.5 / 2 open the View menu with the mouse or by selecting Alt and V at the same time. Select the Text Size option with the mouse or select Z. Increase or decrease the text size with the mouse or by using the up and down arrow keys and selecting Enter.
- In Firefox versions earlier than 1.5 open the View menu with the mouse or by selecting Alt and V at the same time. Select the Text Size option with the mouse or by selecting S twice. Increase or decrease the text size with the mouse or by using the up and down arrow keys and selecting Enter.
- In Netscape click on the View menu with the mouse or select Alt + V . Click on the Text Zoom option with the mouse or select Z. Click on the text size you want with the mouse or use the up and down keys and then Enter to select the text size you want.
- In Opera press + (in some versions you might need to select the Shift key as well) to increase size and the - (minus) to decrease text size. Each click will increase or decrease the size by 10%. Alternatively select Alt + V to bring up the view menu and then select Z to bring up the zoom options then use the up and down arrow keys to select the option you want followed by Enter.
In MacIn Firefox, Internet Explorer or Netscape 7 select Apple and + (plus) to increase the text size and Apple and - (minus ) to decrease the text size
- In Opera for OS 8 and 9, select Apple + Y. Click on Fonts and colors or use the down arrow to select it. Click in the box next to Minimum font size (pixels) or use Tab until the box is highlighted and enter a minimum font size
- In Opera 8 / 9 for OS X select Apple + , (comma). Click on the Web pages tab or select Alt + Tab until the Web pages tab is selected. Click on the Page Zoom option box and select your zoom size or use the Tab key twice to select the page zoom option box and use the up and down arrow keys to select your zoom size.
- In Safari click on the View menu with the mouse. Click on Make Text Bigger or Make Text Smaller to change the font size
- In Firefox open the View menu with the mouse or by selecting Alt + V. Click Text Size. Click on Increase or Decrease to change the text size or use the right arrow to expand the Text Size menu options and use the up and down arrow to select Increase or Decrease and then select Enter
- In Konqueror select Ctrl and + (plus) to increase the text size and select Ctrl + - (minus) to decrease the text size
- In Opera 8 /9 select Shift and + to increase size and Shift + - to decrease text size. Each time you repeat this will increase or decrease the size by 10%.
- In Opera 6 /7 click on the File menu or select Alt + F. Click on the Preferences option or select R. Select Page Style. Click on the box under Default Zoom and when the list pops up click on the font size you want or select Alt + Z and use the up and down arrows to select the font size you want
Let us know if you have difficulties using this siteIf you have trouble using the site your feedback will help us to make it better, so if you spot any problems please visit the Feedback Page and let us know.
All constructive feedback regarding the accessibility or usability of this site is welcome.
This statement was last updated on 17 January 2013
Page currency, Latest update: 18 May, 2011