We are committed to ensuring that the information on this website is available to the widest possible audience.

We have developed this website to be compliant with the W3C Web Content Accessibility Guidelines. The website also incorporates other accessibility features not specific to the W3C Web Content Accessibility Guidelines, such as the ability to change font size.

If you find that part of this website does not meet your accessibility needs, please contact us via the contact form.

Accessibility features

Links to other websites and documents

All links to external websites should open in a new browser window. Links to documents should open up a landing page in the same browser window which contains the file size and format of the document. Links to documents from these landing pages should then open the document in a new browser window.

Changing text appearance

You can change the text size settings in your web browser. Just follow the instructions available from your browser’s ‘Help’ function.

Keyboard navigation

Keyboard navigation is an alternative to the mouse for browsing websites. This increases accessibility for visitors who have difficulty using a mouse or pointer tool.

Use the arrow keys to scroll up or down pages. Use the tab key to move between links (‘skip links’), and press return or enter to select one. Use the backspace key to go back to the previous page.


This website includes a variety of files for download.

Portable document format (PDF)

There are some PDFs on this website. PDF is a universal file format by Adobe. It retains all the elements of a printed document as an electronic image.

The PDF can be viewed, navigated, forwarded to others, or printed exactly as it appears on screen, using the free Adobe Acrobat Reader software.

Adobe PDF Reader

Trouble opening a PDF

If you are experiencing problems opening a download file (such as a PDF or Word file), try saving it to your computer before you open it.

Converting a PDF to text

A conversion service offered by Adobe that will convert to text Adobe PDF files that are in English and most West European languages. Visit