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Cookies are used on this website to improve user experience and for essential functionality; they are not used for identification purposes.
You can learn more about managing cookies at About Cookies.
We use the following cookies on the website:
We call these 'essential' cookies because they enable certain things on the website to happen. If they didn't, your experience of using the site would be compromised and it might become unusable.
These will always be turned on.
Determines whether the beta banner is open or closed.
Determines whether the announcement banner is open or closed.
Determines whether the user can view press versions of news articles.
These cookies tell us how you use the site so we can improve it and understand more about how it's used.
Used to distinguish users.
__utmz keeps track of where the visitor came from, what search engine you used, what link you clicked on, what keyword you used, and where they were in the world when you accessed a website. It expires in 15,768,000 seconds – or, in 6 months.
2 years from set/update
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.
Used to throttle request rate.
30 mins from set/update
__utmb is the cookie that keeps track of timeouts and the number of page views your website gets. It also records the start time of each visit.
Used by Google AdSense for experimenting with advertisement efficiency across websites using their services. The main purpose of this cookie is: Targeting/Advertising
These are performance cookies which are used to collect information about how our visitors use the website.
In certain cases we may use ‘remarketing’ services to target our ads to you based on your prior use of our site when you visit other sites included within an online advertising network.
If you do not wish to be tracked in this way, you can opt out via the following:
This cookie will help deliver our advertising to people who have already visited our website when they are on Facebook or a digital platform powered by Facebook Advertising.