What performance cookies does the BBC use?

Page updated: 10 September 2019

List of performance cookies

This list will be constantly updated, therefore we recommend checking it from time to time.

Cookie name What it's for


In Bitesize, prevents tracking code from sending information to HubSpot. Still allows anonymised information to be sent to HubSpot, so different from opting out of cookies.


Used in Bitesize to remember not to ask the user to accept cookies again.


Used in Bitesize to test whether the user has support for cookies enabled.


Keeps track of Bitesize sessions.


Used in Bitesize to determine if the user has restarted their browser.


Used in Bitesize to record the domain, utk, first visit, last visit, this visit, and session number.


Used in Bitesize to set apart unique users by assigning a randomly generated number as a client identifier. Used to calculate visitor, session and campaign data for analytics reports.


In Bitesize, used to throttle the request rate.


Used in Bitesize to store and update a unique value of each page visited, distinguishing the users.


Used in Bitesize to store a session identifier to monitor session counts.


Checks if a user has been authenticated.


Used in Bitesize to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, inflight request or an error retrieving a Client ID from AMP Client ID service.


It places users into pre-defined 'segments' when loading a page with an active experiment. Users in each segment will get a slightly different experience (i.e. may see a button in a different colour). 


Stores whether we have asked you to share the location or not.


Users are placed into pre-defined 'segments' when loading a page with an active experiment. Users in each segment will get a slightly different experience (i.e. may see a button in a different colour).


Identifies visitors included in website optimisation tests to understand if the website is operationally efficient and delivering the right customer experience.


This cookie value can be disabled by turning off personalisation, it stores the hashed user ID to track signed in activity.


Stores analytics identifiers using in reporting usage of BBC TV services.


Collects data on the traffic and engagement for the site to provide the BBC with a competitive context of their performance versus the market. For more information please visit the Scorecard Research Privacy Policy.

Opt-out of ScoreCard Research cookies.

dtPC / rxVisitor / rxvt / dtSa / dtLatC

Stores session ID for world service users / Stores an (anonymous) ID for the user, to correlate across sessions on world service / Stores two timestamps, to determine session length and end of session / Saves action names across pages so we can monitor performance across pages / Measures delay of page transmission from user browser to BBC server.

You can opt in or out of this reporting in cookie settings.


Used in Bitesize to keep track of page views in a session.


Keeps track of a user's identity in Bitesize.


Used in Bitesize, to store a unique ID for the duration of the user's browsing session on a site.


In Bitesize, used to recognise other users who chat with you via the messages tool.


Used by the 3rd-party mPulse product in monitoring page load performance and overall user experience.

youwantthe​cookieshown / youwant​thecookie

Allows Tribepad to remember whether you had cookies turned off or on for their site to help us keep as much functionality working as possible for you.


Cookie set by YouTube to track views of embedded videos on BBC sites.

Opt-out here

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