Box 1.

Design score

Basic factors (1 point each) Use of sans-serif typeface in headings, main text, and captions Use of a single typeface in headings, main text, and captions ‘Scannable’ text — use of features such as subheadings, bullet lists, or paragraph breaks to divide information Bold: used for emphasis only No block capitals No italicised text Clear contrast between text and background colours Optimised for smartphone browsers — the webpage must automatically detect it is being viewed on a smartphone screen and adjust to the screen ratio so that it is usable Additional items if images present (1 point each) Captioned illustrations — all images should be captioned Alt text (a meaningful description of the image that screen-reading software can read aloud to aid users who are partially sighted) on illustrations