A cookie is a file containing an identifier (a string of letters and numbers) that is sent by a web server to a web browser and is stored by the browser on your computer's hard drive. The identifier is then sent back to the server each time the browser requests a page from the server.
Cookies may be either "persistent" or "session" based: a persistent cookie will be stored by your web browser and will remain valid until its set expiry date, unless deleted by you before the expiry date; a session cookie, will expire at the end of your session, when the web browser is closed.
Cookies do not typically contain any information that personally identifies you, but personal information that we store about you may be linked to the information stored in a cookie. Most browsers allow you to refuse to accept cookies and to delete cookies. For example, if you are using the following browsers, the options are here:
Google Analytics (_ga) This Cookie is placed by Google Analytics, which anonymously track things like numbers of visits/visitors/pageviews to our website, popular pages, customer journeys, and what browser or device people are using. It does not collect any personal information about the individual user. This enables us to monitor the performance of the website, ensure it can be used by everybody, and to deliver relevant and timely information to users. Based on anonymous browsing activity and cookie information, we may personalise some areas of content to deliver more relevant information to website visitors. You can find out more about how Google Analytics uses your data here. To opt out of Google Analytics click here.
Twitter Conversion Tracker (uwt.js) This Cookie is placed by Twitter. It enables us to learn how our users have interacted with our advertising served to them on Twitter. To opt-out click here.
We infer consent to use the cookies stated on this page. If you do not consent then you can disable any cookies already stored on your computer or device and you can control cookies by using your browser controls. If you remove all cookies, this may stop our website from functioning properly.