The site has been set up with visually impaired users in mind. The text can be resized in most browsers.
If you find the test size or colour scheme hard to read then please use the navigation bar Big Text option to change the appearance of the site.
The Big Text option increases the text size and changes the site colours to a scheme that has more contrast.
The Standard Text option is available on Big Text pages. This reverts the site back to the standard colour scheme and text size.