What are cookies?
Cookies are small pieces of information which include a unique reference code that a website transfers to your device to store and sometimes track information about you. A number of cookies we use last only for the duration of your web session ("session cookies") and expire when you close your browser. Other cookies are used, for example, to remember you when you return to the site and will last for longer ("persistent cookies"). Cookies cannot be used to run programs or deliver viruses to your computer. They are uniquely assigned to your device and are sent back to the originating website on each subsequent visit (if they last longer than a web session) or to another website that recognises that cookie.