Accessibility statement

Pages use semantic headings, labelled navigation, visible keyboard focus, skip links, descriptive link text and text alternatives for meaningful images. Layouts are designed to reflow on small screens and browser zoom.

The site does not depend on animation, audio or complex interactive controls. Optional analytics can be accepted, rejected or changed using keyboard-operable controls.

If any page or document is difficult to use, please use the contact page and include the page address, the problem encountered, and—if you are comfortable doing so—the browser or assistive technology involved. I will try to provide the information in an accessible alternative and correct the underlying issue.

This statement was last reviewed on 25 July 2026.