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.
We use both session and persistent cookies on our website.
The names of the cookies that we use on our website, and the purposes for which they are used, are set out below:
we use Google Analytics cookies recognisable by the following names _utma, _utmb, _utmc and _utmz. These cookies are used to collect information about how visitors use our website. We use this information to compile reports and to help us improve the website. The cookies collect information in an anonymous form, including the number of visitors to the website, where visitors have come to the website from and the pages they visited.
we use Act-On tracking cookies that allow us to collect information about how you use our site after you have received an email from us. The cookies track data linked to your email address and include data such as how you arrived at the site, how often you’ve visited, and which pages you looked at. To opt out of this, you can disable cookies or unsubscribe using the link on the bottom of the email.
Most browsers allow you to refuse to accept cookies; for example:
in Internet Explorer you can block cookies using the cookie handling override settings available by clicking “Tools”, “Internet Options”, “Privacy” and then “Advanced”;
in Firefox 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, 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.
You can delete cookies already stored on your computer; for example:
in Internet Explorer, you must manually delete cookie files (you can find instructions for doing so at http://support.microsoft.com/kb/278835);
in Firefox, 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
in Chrome, 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”.
Deleting cookies will have a negative impact on the usability of many websites.