Cookies and website privacy

Like many other websites, ours uses small text files called ‘cookies‘ in order to operate. These cookies are stored on your computer and accessed whenever you visit our site. They help us learn how often you visit, which pages you view, and so on. But don’t worry — nothing that personally identifies you or your precise location is stored by us. Everything is anonymous.

To comply with EU law, we have to inform you of our use of cookies.

Cookies set by this website

The following table details which cookies are set by this website, and their functions.

Cookie Type Duration Description
AMP_TOKEN Persistent 30 seconds to 1 year It does not track any personal data.
_ga, _gat Persistent Up to two years This is set by Google Analytics, which helps us learn more about how people use our website. For example, which pages are more popular, and how people get to our website. The cookie is updated every time data is sent to Google Analytics.
_gid, _gac Persistent Up to 90 days This is set by Google AdWords, which helps us learn which of our Google ads is helping people find out about our work.

There are also third-party cookies set by other services which we have embedded into our website (for example, YouTube). Please visit their websites to find out more about their use of cookies.

You can opt out of Google Analytics tracking using Google’s opt-out tool.

Blocking cookies

You can change your browser options to block certain cookies. To find out more about settings in your browser, check your browser’s help menu.


When visitors leave comments on the site we collect the data shown in the comments form, and also the visitor’s IP address and browser user agent string to help spam detection.

An anonymised string created from your email address (also called a hash) may be provided to the Gravatar service to see if you are using it. The Gravatar service privacy policy is available here: After approval of your comment, your profile picture is visible to the public in the context of your comment.

Visitor comments may be checked through an automated spam detection service.