How we use cookies

We use necessary cookies to make our site work. We'd also like to set optional analytics cookies to help us to improve it. We won't set optional cookies unless you enable them. Using this tool will set a cookie on your device to remember your preferences.

For more detailed information about the cookies we use, see our 'Cookies Page'.

Necessary cookies

Necessary cookies enable core functionality such as security, network management, and accessibility. You may disable these by changing your browser settings, but this may affect how the website functions.

Analytics cookies

We'd like to set Google Analytics cookies to help us to improve our website by collecting and reporting information on how you use it. For more information on these cookies please see our 'Cookies Page'. The cookies collect information in an anonymous form.

Select your preference:

Analytics cookies



This website has been created using Cascading Style Sheets (CSS) and XHTML. Not only does this make the site run more efficiently, it makes it more accessible to screen reading software.

In addition, you can increase the text size by pressing one of the 3 buttons at the top right of the site. This setting will be remembered throughout your visit.

To make this site more accessible, please read the instructions below on how to increase the text size and disable CSS formatting using your browser controls.

How to change your text size

Most of the text in this site is scalable.

  • For Internet Explorer 6+:
    Select View > Text Size and choose your preferred text size (from smallest to largest).
  • For Firefox 2+:
    Select View > Text Size and increase or decrease the text size. This can be done multiple times to achieve the size you are happy with.
  • For Opera 9.5+:
    Select View > Zoom and choose a percentage zoom level to increase the size of the entire site.

How to disable CSS

If you would like to remove CSS entirely from this site (i.e. remove all colours, layouts and text styles), you can do this by switching off CSS in the browser. The result is a text only version of the site. Different browsers give different results - we recommend Opera for best results.

  • For Internet Explorer 6 & 7:
    Select Tools > Internet Options and press the Accessibility button in the General tab. Tick the 3 tick boxes which say;
    • 'Ignore colours specified on webpages'
    • 'Ignore font styles specified on web pages'
    • 'Ignore font sizes specified on web pages'
  • For Internet Explorer 8:
    Select View > Style and select 'No Style'.
  • For Firefox 2+:
    Select View > Page Style then select 'No Page Style'.
  • For Opera 9.5+:
    Select View > Style then select User Mode. Opera has excellent options on the Style menu which allow you to customise the site including Accessibility Layout and High Contrast styles.