A cookie is a 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 expiry date, unless deleted by the user before the expiry 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.
Strictly Necessary Cookies
These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. These cookies do not store any personally identifiable information.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Most browsers allow you to refuse to accept cookies and to delete cookies. The methods for doing so vary from browser to browser, and from version to version. You can however obtain up-to-date information about blocking and deleting cookies via these links:
(a) https://support.google.com/chrome/answer/95647?hl=en (Chrome);
(b) https://support.mozilla.org/en-US/kb/enable-and-disable-cookies-website-preferences (Firefox);
(c) http://www.opera.com/help/tutorials/security/cookies/ (Opera);
(d) https://support.microsoft.com/en-gb/help/17442/windows-internet-explorer-delete-manage-cookies (Internet Explorer);
(e) https://support.apple.com/kb/PH21411 (Safari); and
(f) https://privacy.microsoft.com/en-us/windows-10-microsoft-edge-and-privacy (Edge).
Blocking all cookies will have a negative impact upon the usability of many websites.
If you block cookies, you may not be able to use all the features on our website.