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How use cookies on this website

About Cookies

A cookie is a small file of letters and numbers that we put on your computer if you agree. These cookies allow us to distinguish you from other users of the website which helps us to provide you with a good experience when you browse our website and also allows us to improve our site.

Cookies are either permanent (usually with a long term expiry date) or are only used in the current session and cease to exist when the browser is shut down (so-called 'session cookies').

How cookies are used on this website

The following table lists the cookies that may be used on this website.

Cookie Issued By Expires Purpose
_utma Google Analytics 2 years from set/update.
Identifying Unique Visitors
_utmb Google Analytics 30 minutes from set/update Determines visitor session
_utmc Google Analytics On browser close Determines visitor session
_utmt Google Analytics 10 minutes Used to throttle request rate.
_utmz Google Analytics 6 months from set/update Tracking Traffic Sources & Navigation
_utmv Google Analytics 2 years from set/update Custom Variables
ARRAffinity Session Helps keep track of user between requests to the website

Google Analytics code collects information about the usage of our website and helps us make informed decisions on how best to further develop the site by identifying information such as how many visitors the site receives and what the most popular pages are. You can find more information about Google Analytics cookies here.

We use permanent cookies as well as session cookies to provide features of the site that require authentication. To secure the optimum functioning of the website we would recommend allowing at least the setting of session cookies as they are essential for access to parts of the site that require authentication, e.g. when you add content to the site.

By continuing to use this site, you consent to opt in to the use of cookies on this website..

Allowing or declining cookies

Most web browsers allow some control of most cookies through the browser settings. To find out more about cookies, including how to see what cookies have been set and how to manage and delete them, visit If you delete cookies it may prevent you from taking full advantage of the website.