A cookie is a data file containing an identifier (a string of letters and numbers) that is sent by a web server to a web browser and is stored by the browser. The identifier is then sent back to the server each time the browser requests a page from the server. Cookies may be either “persistent” cookies or “session” cookies: a persistent cookie will be stored by a web browser and will remain valid until its set expiration date, unless deleted by the user before the expiration date; a session cookie, on the other hand, will expire at the end of the user session, when the web browser is closed. Cookies do not typically contain any information that personally identifies a user, but Personal Information that we store about you may be linked to the information stored in and obtained from cookies.
Based on what function cookies have and the purpose for which cookies are used, there are four categories of cookies: essential cookies, analytics cookies, functional cookies and marketing cookies.
Most browsers allow you to refuse all or some browser cookies, or to alert you when websites set or access cookies. The methods for doing so vary from browser to browser, and from version to version. You can however obtain information about blocking and deleting cookies for some commonly used browsers via the links below:
- Internet Explorer: https://support.microsoft.com/en-gb/help/17442/windows-internet-explorer-delete-manage-cookies;
- Safari: https://support.apple.com/kb/PH21411.
Please note that blocking all cookies will have a negative impact upon the usability of many websites and if you choose to block cookies, you may not be able to use all the features on our Sites. For more information about cookies, including how to see what cookies have been set on your computer or mobile device and how to manage and delete them, visit www.allaboutcookies.org.