1. Introduction 5. Blocking cookies 5.1 Most browsers allow you to refuse to accept cookies; for example: (a) in Internet Explorer (version 10) you can block cookies using the cookie handling override settings available by clicking "Tools", "Internet Options", "Privacy" and then "Advanced"; (b) in Firefox (version 24) 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 (c) in Chrome (version 29), 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. 5.2 Blocking all cookies will have a negative impact upon the usability of many websites. 5.3 If you block the cookies from our website you will have to enter your personal details again at the login screen 6. Deleting cookies 6.1 You can delete cookies already stored on your computer; for example: (a) in Internet Explorer (version 10), you must manually delete cookie files (you can find instructions for doing so at http://support.microsoft.com/kb/278835); (b) in Firefox (version 24), you can delete cookies by clicking "Tools", "Options" and "Privacy", then selecting "Use custom settings for history", clicking "Show Cookies", and then clicking "Remove All Cookies"; and (c) in Chrome (version 29), you can delete all cookies by accessing the "Customise and control" menu, and clicking "Settings", "Show advanced settings" and "Clear browsing data", and then selecting "Delete cookies and other site and plug-in data" before clicking "Clear browsing data". 6.2 Deleting cookies will have a negative impact on the usability of many websites.