Content should be presented in a clear and easy to understand way and accessible for passengers with impairments such as blindness or low vision, deafness or hearing loss, learning disabilities, cognitive limitations, restricted movement, photosensitivity or any combination of these. The design of your websites should take into consideration existing international guidelines on website accessibility.

Read more at
http://www.accessibilitynewsinternational.com/uk-caa-tighten-information-rules-for-disabled-passengers/