A cookie is a small piece of data sent from a website and stored in a user's web browser and enable a site to 'remember' little bits of information between pages or visits.
For more information on cookies see: http://en.wikipedia.org/wiki/HTTP_cookie
These cookies are used to enable core site functionality and make the site easier for you to use. They do not contain any personal information and are automatically deleted when you close your browser. Accepting these cookies is a condition of using the website.
These cookies provide us with statistics on how our website is used, so that we can measure and improve the performance of the site, using a service provided by Google.