This web site has been built to comply with accessibility guidelines. In order to do this, we’ve used techniques supported by modern browsers (Internet Explorer 6.0 or later, Safari or Mozilla Firefox).

Modern browsers also make navigation faster and allow us to provide more advanced content and features. This means that, if you are using an older browser, you may be viewing our web site in a more simplified form.

You can download the latest version of your preferred web browser below:


The site has been designed to make it as easy and quick to navigate as possible.

Use the menu at the top of the web page to enter the main sections of the web site. Once you are in a section, you can get to the more detailed information via the menu that appears on the right-hand side of the screen.


We have built this web site to meet W3C accessibility standards. These standards aim to give all users equal access to web sites.

To make this web site as easy as possible for you to read, you can control the size of the text and the contrast between the text and the background. We have also implemented access keys. These are keyboard shortcuts that you can use instead of a mouse. You can find more information about these options on our Accessibility page.


To enable cookies, follow the instructions below for the browser version you are using.

Mozilla Firefox

  • Go to the "Tools" menu
  • Select "Options"
  • Select the "Privacy" icon in the left panel
  • Check the box corresponding to "Allow sites to set cookies"
  • Click "OK" to save changes

Microsoft Internet Explorer

  • Select "Internet Options" from the Tools menu
  • Click on the "Privacy" tab
  • Click the "Default" button (or manually slide the bar down to "Medium") under "Settings"
  • Click "OK"


  • Go to the "Safari" menu
  • Select "Preferences"
  • Select the "Security" tag
  • Under "Accept cookies" check the box corresponding to "Only from sites you navigate to"

Adobe PDF

Adobe PDF is a file format that saves existing documents with all their original formatting. This means that when you look at a PDF document you will see the formatting and layout that the author intended, even if you do not have the program they were originally created in.

In order to view PDF documents, you will need to have the free Adobe Acrobat Reader software installed on your computer.

On the Adobe web site, make sure that you choose the right options in the drop-down boxes before you download (eg Windows XP for your operating system). Make a note of where you are downloading the installation file to (eg your desktop). After the download has completed, locate the installation file on your computer and double-click on it. The installation program will do the rest.

Once the Adobe Acrobat Reader software has been installed you will be able to read Adobe PDF files.

Saving a PDF

To save a PDF to your computer, right-click your mouse over the PDF link and select “save target as” or “save link as”. If you have an Apple computer, click the link whilst holding down the “option” key. You can then save the PDF where you want on your computer.

Accessible PDFs

We recommend that users download the latest version of Adobe Acrobat Reader to access Adobe PDF files.

Adobe Reader enables users to read and use Adobe PDF documents and forms more easily – and across multiple languages.

For further information about accessibility and PDFs, please visit

Adobe PDF troubleshooting

I have clicked on the link but my browser’s just gone blank.

Browsers have different ways of downloading PDFs. Most will ask you where you would like the file to download on your machine and show a progress meter as the file downloads. However, some older browsers load in the PDF page by page and don’t show a progress meter. In fact, the file is downloading – the first page should appear after a few moments.

I’ve downloaded the file but nothing has appeared.

You may need to go to where the file was downloaded on your local drive (probably your c:/windows/temp directory) and click on it from there. If it doesn’t work, your Reader is not working properly and should be reinstalled.

For further troubleshooting suggestions, see Adobe technical support.

Video and audio


To view and listen to the videos on the site you need to have Windows Media Player or RealPlayer installed on your machine.

You can download Windows Media Player free from the Microsoft web site and RealPlayer from the RealNetworks web site.

Adobe Flash

The site may contain animations and enhanced navigation features, which are created in Flash format. If you wish to view them, you will need Macromedia Flash Player, which is available free from the Adobe site.

If you do not have Macromedia Flash Player installed on your computer, you will automatically see alternative content for anything created in Flash.

RSS feeds

What is RSS?

RSS (Really Simple Syndication) is a technology that enables you to subscribe to receive content from web sites.

How does it work?

To use RSS you need a reader, which checks the feeds you are subscribed to and displays any new content. This means you don’t have to check individual web sites for updates – the reader does it for you.

You can get a reader by downloading one to your computer. You could also sign up to a free web-based service such as Bloglines.