Site help

Site help


This website has been built to comply with accessibility guidelines. In order to do this, we've used techniques supported by modern browsers (Internet Explorer 8 or later, Safari, Mozilla Firefox or Google Chrome).

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 website 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 site. Once you are in a section, you can get to the more detailed information via the menu that appears on the left-hand side of the screen or the related modules on the page.


We have built this website to meet W3C accessibility standards. These standards aim to give all users equal access to websites.

To make this website 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.  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

  1. Go to the "Tools" menu
  2. Select "Options"
  3. Select the "Privacy" icon in the left panel
  4. Check the box corresponding to "Allow sites to set cookies"
  5. Click "OK" to save changes

Microsoft Internet Explorer

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


  1. Go to the "Safari" menu
  2. Select "Preferences"
  3. Select the "Security" tag
  4. Under "Accept cookies" check the box corresponding to "Only from sites you navigate to"

Google Chrome

  1. Click the wrench icon on the browser toolbar
  2. Select "Options" ("Preferences" on Mac and Linux; "Settings" on a Chromebook)
  3. Click the "Under the Hood" tab
  4. Click "Content settings" in the "Privacy" section
  5. Click the "Cookies" tab in the "Content Settings" dialog that appears
  6. Make sure "Allow local data to be set" is selected

Adobe PDF

Adobe PDF is a file format which 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 originally created it in.

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

Download Adobe Acrobat Reader

On the Adobe website, make sure that you choose the right options in the drop-down boxes before you download (e.g. Windows XP/7 for your operating system). Make a note of where you are downloading the installation file to (e.g your desktop). After the download has completed, locate the installation file on your computer and double click on it. The installation programme 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 7.0 enables users, read and use Adobe PDF documents and forms more easily - and across multiple languages.

For further information about accessibility and PDFs, please visit Adobe accessibility.

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 browsers (such as Explorer 5 with Acrobat 4) 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 minutes.

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 a media player or Adobe Flash installed on your machine. Our media player will try and detect what system you have and present the most appropriate format.

Download Adobe Flash Player

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


An MP3 file is a compressed audio file. Most modern computers will come with software capable of playing MP3 files. If your computer does not, you may find one of the following popular programs useful: