Designing for users or are deaf or hard of hearing

Write in plain language
Use subtitles or provide transcripts for videos
Use a linear, logical layout
Break up content with sub-headings, images and videos
Let users ask for their preferred communication support when booking appointments

Use complicated words or figures of speech
Put content in audio or video only
Make complex layouts and menus
Make users read long blocks of content
Make telephone the only means of contact for users