The site sets cookies of its own only when you buy tickets, to keep your basket and checkout working. If you accept analytics, Google Analytics sets two, _ga and _ga_9YDL5Y8CZV, to count visits and see how the site is used. They keep for up to two years, and what they record goes to Google, which runs the service.

Decline, or choose nothing, and nothing is loaded from Google Analytics. Maps load from Google only when you press Show the map. Your choice is remembered in this browser and can be changed at any time from Cookie settings at the foot of the site.