Our website uses "session" cookies that will expire at the end of the user session, when the web browser is closed. 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.
Most browsers allow you to refuse to accept cookies; for example:
in Internet Explorer (version 11) you can block cookies using the cookie handling override settings available by clicking "Tools", "Internet Options", "Privacy" and then "Advanced";
in Firefox (version 47) you can block all cookies by clicking "Tools", "Options", "Privacy", selecting "Use custom settings for history" from the drop-down menu, and unticking "Accept cookies from sites"; and
in Chrome (version 52), you can block all cookies by accessing the "Customise and control" menu, and clicking "Settings", "Show advanced settings" and "Content settings", and then selecting "Block sites from setting any data" under the "Cookies" heading.
Blocking all cookies will have a negative impact upon the usability of many websites.
If you block cookies, you will not be able to use all the features on our website.
Deleting cookies will have a negative impact on the usability of many websites.