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:
https://support.microsoft.com/en-gb/help/17442/windows-internet-explorer-delete-manage-cookies (Internet Explorer);
https://support.apple.com/kb/PH21411 (Safari); and
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 websites.