Cookies are small text files that are placed on your computer by web sites that you visit. They are widely used to make web site work, or work more efficiently.
Some of the cookies we use are essential for parts of this site to operate. Others are optional, and the Opt-out information is detailed below.
We use Google Analytics, which creates a number of first-party cookies, all prefixed __utm:
__utma: contains a unique and anonymous identifying ID, which allows us to ensure that subsequent visits to our website are recorded as belonging to the same (unique) visitor. This cookie expires after two years.
__utmb: used to establish and continue a unique user session. Each time you request another page from the website the cookie is updated to expire after 30minutes.
__utmc: works with __utmb to determine when to create a new session for a website visitor. This is a session cookie and expires when you exit the browser.
__utmz: tracks how you found us and is used to calculate traffic and navigation within the website. It is updated with every new page view and expires after 6 months.
You may also sometimes find a __utmv cookie which relates to custom reporting segments, a feature which we occasionally use on Google Analytics.
If you have any further questions, please email email@example.com.