The website is optimised for use with Screen Readers. Plus you also have several layout options, built into the Accessibility menu on the top right hand side of the page.
Black and White
This removes all of the colour, making an easy to view black and white version.
This high contrast version is suitable for people with eyesight problems.
Increase Text Size
This will increase the text size once, clicking on the button again will restore the original text size.
Your browser will be able to zoom in or out of the page to make text larger and easier to read – it depends which browser you use but “ctrl +” usually increases the size, and “ctrl -” usually decreases the size.