Cookie policy


To enable this app to function, we sometimes place small data files on your computer. These are known as cookies.

To learn more about cookies and how to manage them, visit Or please read on to find out more about how and where we use cookies.

How we use cookies

This app uses essential cookies in some places - we've listed each of them explicitly in a table below with more details about why we use them and how long they will last.

These essential cookies are used for site navigation and session management, and this app may not function correctly without them. They are used only to help you navigate through the site and to view and participate in challenges.

This app may use non-essential cookies in some places. These non-essential cookies are not required to make the app function correctly. If any non-essential cookies are used in this app, you will find them listed below.