Cookies may be either “persistent” cookies or “session” cookies. A persistent cookie consists of a text file sent by a web server to a web browser, which will be stored by the 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.
The law states that we can store cookies on your machine if they are essential to the operation of the Site, but that for all others we need your permission to do so.
The list below explains the cookies we use and why:
Analytics And performance cookies
We use Google Analytics to optimise the site
Lasts 2 years. Used to distinguish users.
Lasts 24 hours. Used to distinguish users.
Lasts 1 minute. Used to throttle request rate. If Google Analytics is deployed via Google Tag Manager, this cookie will be named _dc_gtm_<property-id>.
Lasts 30 seconds to 1 year. Contains a token that can be used to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, inflight request or an error retrieving a Client ID from AMP Client ID service.
Lasts 90 days. Contains campaign related information for the user.
Lasts 10 minutes. Used to throttle request rate.
Lasts until the end of browser session. Not used in ga.js. Set for interoperability with urchin.js. Historically, this cookie operated in conjunction with the __utmb cookie to determine whether the user was in a new session/visit.
Lasts 2 years from set/update. Used to store visitor-level custom variable data. This cookie is created when a developer uses the _setCustomVar method with a visitor level custom variable. This cookie was also used for the deprecated _setVar method. The cookie is updated every time data is sent to Google Analytics.
Most web browsers are set to accept cookies by default. If you do not wish to receive cookies from us or any other website, you should be able to turn cookies off on your web browser: please follow your browser provider’s instruction in order to do so. Unfortunately, we cannot accept liability for any malfunctioning of your PC or its installed web browser as a result of any attempt to turn off cookies. Please note that if you choose to remove or reject cookies, this could affect the availability and functionality of our Services.