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Cookies are small text files which help websites to remember your preferences, keep track of the pages you browse and generally customise your experience of the site. They are created when you visit a site and are either stored on your computer to be activated when you visit that site again (persistent) or are deleted when you leave (temporary). They don't normally contain information which can personally identify you: they simply contain the URL of the website, the duration & scope of the cookie and a random number. Please see below for the cookies used on this site and use the tools to switch them on or off.