How this site worksThis article sits within the How this site works section

Cookies are files saved on your phone, tablet or computer when you visit a website.

We use cookies to store information about how you use the website, such as the pages you visit.

Google Analytics cookies

We use Google Analytics to measure how you use this website so we can improve it based on user needs. We do not allow Google to use or share the data about how you use this service.

Google Analytics sets cookies that store anonymised information about:

  • how you got to the website
  • the pages you visit on the website and how long you spend on each page
  • what you click on while you're visiting the website

Cookie details

Cookie name Cookie purpose Cookie duration
_ga This helps us count how many people visit this website by tracking if you've visited before. When the browsing session ends
_gid Stores and updates a unique value for each page you've visited to help us improve your experience. 1 day

Communication and marketing cookies

These cookies may be set by third party websites and do things like measure how you view YouTube videos that are on this website.

Some pages on this website may contain content from third party sites, like YouTube, which may set their own cookies. This tells us how many people are seeing the content and whether it’s useful.


Cookies we cannot disable

These include:

  • essential cookies do things like remember the notifications you've seen so we do not show them to you again
  • cookies that ensure the platform we’ve used to build this site work properly

They always need to be on.

Cookie details

Cookie name Cookie purpose Cookie duration
__cfruid , __cfduid This cookie is a part of the services provided by Cloudflare, including load-balancing, delivering  website content and serving DNS connection for website operators. Session
__cf_bm This cookie is used to distinguish between humans and bots. This is beneficial for the website, in order to make valid reports on how it's being used. 1 day
AnalyticsConsent Allows us to track whether you have opted in or out of analytics tracking. 1 year
MarketingConsent Allows us to track whether you have opted in or out of marketing tracking. 1 year
seen_cookie_message_help Tracks whether the cookie message has been seen and dismissed so that we do not show it again. 1 year
_help_center_session Stores a unique session key for the Help Center product. Session
_zendesk_authenticated Tracks whether a user is logged in or not. Session
_zendesk_cookie Stores settings information for various features. 20 years
_zendesk_session Stores a unique session key for the Zendesk Classic application. Session
_zendesk_shared_session Stores a unique session key for a session shared across Zendesk products. 1 day
wsid Stores user’s session id for authentication and resuming sessions. Session or 30 days
ZD-referrerPolicy Stores referrer tags. Forever (unless purged through normal browser activity)
ZD-zE_oauth Stores the authentication token once the user has been authenticated. 2 hours
ZD-currentTime Sets the time when a page loads.


ZD-settings Stores a hash of settings so that we don't keep sending blips after the initial one.


ZD-suid Session id for pathfinder.

20 minutes

ZD-buid Collects machine ID. Forever

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