This site uses cookies, but they do not identify users and we only use them to gather statistical information. The site does not capture and store any personal information about individuals who access it. Further information on use of cookies by this site is set out below.

What are cookies?

Cookies’ are small text files that are stored by the browser (e.g. Internet Explorer or Safari) on your computer or mobile phone. They allow websites to store such things as user preferences. You can think of cookies as providing a 'memory' for the website, enabling it to recognise a user and respond appropriately. You can disable cookies though your browser settings.

Analytics cookies

This site uses Google Analytics cookies. Every time a user visits our website, web analytics software generates an anonymous analytics cookie. These cookies give us statistical information: for example, they can tell us whether or not you have visited the site before. Your browser will tell us if you have these cookies, and if you don’t, we generate new ones. This allows us to track how many individual unique users we have and how often they visit the site. These cookies cannot be used to identify individuals, they are used for statistical purposes only.

Accessibility policy

We aim to provide a website that is accessible to the widest possible audience, regardless of technology. The site has been created using semantic XHTML and CSS. Below are some of the things we have addressed in order to make this website accessible to as many users as possible.


This website is viewable with no noticeable degradation of experience in:

On a PC

  • Internet Explorer 8 or 9
  • Latest versions of Firefox and Chrome

On a Mac

  • Latest versions of Safari and Firefox

Graceful degradation will be experienced using Internet Explorer 6 and 7 on a PC.


'Skip to main content' and 'Skip to accessibility policy' links are at the head of every page. They become active when using tab key or screen reader.

Access keys

Two access keys have been added for convenience:

  • 0 – Skip to main content
  • 1 – Skip to this accessibility policy page

Using the keyboard

We have ensured correct keyboard tabbing order of the entire navigation system, for those who prefer a keyboard to a mouse.

Text resizing

Text resizing works correctly on all pages to two increments.

PDF files

PDF files look like a printed page and are used for downloads of documents on this website. Most computers will open PDF documents automatically, but you may need to download Adobe Acrobat Reader. You can download the latest version of the reader from the Adobe website for free.

When you select the link to a PDF, it will open in a new browser window. A toolbar will appear below the browser address bar, featuring a number of tools to help you view and search the document. If you need further help visit the Adobe Acrobat Reader help and support website.


The site complies with the WAI Web Content Accessibility Guidelines to at least level AA.