In most circumstances the website is fully keyboard accessible. As specified within the Page structure section, skip links are being added where appropriate to aid navigation and interacting with most features is possible through keyboard use alone.
When navigating an experiment booking page, once a 'Next week', 'Next day' or 'Previous day' link is selected, the screen focus is not visible and it is not clear where the focus is located on the screen. It also does not alert screen reader users which element is currently in focus or where the cursor is located. This fails WCAG 2.1 success criteria 2.4.7 (focus visible). To regain clear screen focus, pressing the TAB key selects the next appropriate 'Next week', 'Next day' or 'Previous day' link. We are in the process of building a new booking system which will include clear focus for screen readers.
Missing group labels
We are aware that the radio buttons and checkboxes within the filter menus are not associated with their corresponding group label. As a result, on tabbing to the radio buttons using a screen reader, the screen reader reads out only the individual labels associated with the radio buttons, and not the group label of the related radio buttons. This is a known issue and fails WCAG 2.1 success criteria 1.3.1 (info and relationships).