Use of Cookies
Cookies are small text files that are placed on your computer by websites that you visit. They are widely used in order to make websites work more efficiently, as well as to provide information to the owners of the site. One of the cookies we use is essential for parts of the site to operate and has already been set (see ‘Essential site cookie’ below). You may delete and block all cookies from this site, but parts of the site may not work.

Most web browsers allow some control of most cookies through the browser settings. To find out more about cookies, including how to see what cookies have been set and how to manage and delete them, visit http://www.allaboutcookies.org. To opt out of being tracked by Google Analytics across all websites visit http://tools.google.com/dlpage/gaoptout.