Thanks to Deb, our North Wales broker for this information from AbilityNet following a recent training session:
AbilityNet’s own pages on web services are here: http://www.abilitynet.org.uk/webresources
A dedicated website to web accessibility: http://www.webaim.org/
All manner of website building tutorials are here: http://www.w3schools.com/
AbilityNet is a national charity helping disabled adults and children use computers and the internet by adapting and adjusting their technology.