Where icons are used to indicate the type of resource or the destination of a link this needs to be conveyed to screen-reader users in the link text. E.g. <pdf icon> <link: interesting article (PDF)>. (It is not necessary to add anything when it is clear from the text link, e.g. "news forum".) P1. Note it is not sufficient to just add alt text to these icons to convey this information because when screen-readers create a list of links the images will not be included and so the information will not be available in that context.