We use a number of different cookies on our site. If you do not know what cookies are, or how to control or delete them, then we recommend you visit http://www.aboutcookies.org for detailed guidance.
The list below describe the cookies we use on this site and what we use them for. Currently we operate an ‘implied consent’ policy which means that we assume you are happy with this usage. If you are not happy, then you should either not use this site, or you should delete the cookies having visited the site, or you should browse the site using your browser’s anonymous usage setting (called “Incognito” in Chrome, “InPrivate” for Internet Explorer, “Private Browsing” in Firefox and Safari etc.)
First Party Cookies:
These are cookies that are set by this website directly.
You can find out more about Google’s position on privacy as regards its analytics service at http://www.google.com/intl/en_uk/analytics/privacyoverview.html
More information on session cookies and what they are used for at http://www.allaboutcookies.org/cookies/session-cookies-used-for.html
Third Party Cookies:
These are cookies set on your machine by external websites whose services are used on this site. Cookies of this type are the sharing buttons across the site allow visitors to share content onto social networks. Cookies are currently set by Facebook and Twitter. In order to implement these buttons, and connect them to the relevant social networks and external sites, there are scripts from domains outside of our website. You should be aware that these sites are likely to be collecting information about what you are doing all around the internet, including on this website.
You should check the respective policies of each of these sites to see how exactly they use your information and to find out how to opt out, or delete, such information.
Additional information on Google Analytics:
Globally and in the European Union member states Google sets the following cookies
A persistent cookie – remains on a computer, unless it expires or the cookie cache is cleared. It tracks visitors. Metrics associated with the Google __utma cookie include: first visit (unique visit), last visit (returning visit). This also includes Days and Visits to purchase calculations which afford ecommerce websites with data intelligence around purchasing sales funnels.
__utmb Cookie & __utmc Cookies:
These cookies work in tandem to calculate visit length. Google __utmb cookie demarks the exact arrival time, then Google __utmc registers the precise exit time of the user.
Because __utmb counts entrance visits, it is a session cookie, and expires at the end of the session, e.g. when the user leaves the page. A timestamp of 30 minutes must pass before Google cookie __utmc expires. Given__utmc cannot tell if a browser or website session ends. Therefore, if no new page view is recorded in 30 minutes the cookie is expired.
This is a standard ‘grace period’ in web analytics. Ominture and WebTrends among many others follow the same procedure.
Cookie __utmz monitors the HTTP Referrer and notes where a visitor arrived from, with the referrer siloed into type (Search engine (organic or cpc), direct, social and unaccounted). From the HTTP Referrer the __utmz Cookie also registers, what keyword generated the visit plus geolocation data.
This cookie lasts six months. In tracking terms this Cookie is perhaps the most important as it will tell you about your traffic and help with conversion information such as what source / medium / keyword to attribute for a Goal Conversion.
Google __utmv Cookie lasts “forever”. It is a persistant cookie. It is used for segmentation, data experimentation and the __utmv works hand in hand with the __utmz cookie to improve cookie targeting capabilities.