A cookie is a small file of letters and numbers that is stored in a temporary location on your computer to allow our website to distinguish you from other users of the website.
If you don't want to accept cookies, you'll still be able to browse the site and use it for research purposes. Most web browsers have cookies enabled, but at the bottom of this page you can see how to disable cookies. Please note that cookies can't harm your computer. We don't store personally identifiable information in the cookies, but we do use encrypted information gathered from them to help provide you with a good experience when you browse our website and also allow us to improve our site.
Site management cookies
These are used to maintain your identity or session on the Website. For instance, where our websites run on more than one server, we use a cookie to ensure that you are sent information by one specific server (otherwise you may log in or out unexpectedly). We may use similar cookies when you vote in opinion polls to ensure that you can only vote once, and to ensure that you can use our commenting functionality when not logged in (to ensure you don't see comments you've reported as abusive, for instance, or don't vote comments up/down more than once).
These cookies cannot be turned off individually but you could change your browser setting to refuse all cookies (see above) if you do not wish to accept them.