Cookies created by Google Analytics (our website usage tracking software)
These cookies are all used together to record statistics about the usage of the website. For more detailed information please see the Google Analytics cookie information.
__utma. This Cookie is used to identify unique visitors to our sites. The results are sent to our Google Analytics account so that we may see how many unique visitors come to this site based over a period of time. This is a persistent cookie and expires in 2 years.
__utmb. This cookie is used by Google Analytics to determine the visitor session times on our sites. Each time you visit a new page on the site the cookie is set to expire within 30 minutes, if it does not find an existing cookie, a new one is created.
__utmc. This cookie is used by Google Analytics in conjunction with __utmb to determine visitor sessions. Unlike __utmb this cookie does not have an expiry date, it determines whether a new session should be created based on whether you have previously closed your browser, re-opened it and come back to the site. As a Session cookie, it runs just for that visit.
__utmz. This cookie is used by Google Analytics to determine the type of referral used by each visitor to arrive at our site. The cookie determines if the user has come directly to the site or via a search engine, email or email campaign. We use this data to understand how our users arrive at the website. It is a persistent cookie and expires in 6 months.
For further information – https://developers.google.com/analytics/resources/concepts/gaConceptsCookies#HowGAUsesCookies
More information about cookies
The following site has more information about cookies and how they are used by websites:
http://www.aboutcookies.org – Useful information on how to control your cookie usage.