Last updated: 26 Feb 2026

govuk-chat: Deleting opted-out end user data in BigQuery

When using the app, users have the ability to opt out of having us use their data for analysis. We expect this to be a relatively low number of users so for now the process is manual. If the numbers of users increase, we will revisit this and automate it.

When the App team contact us to let us know a user has opted out you should use the bigquery:delete_opted_out_end_user_data rake task. This rake task requires an end-user-id to be passed in as an argument.

It should be run on production. An example of this rake task being called is:

rake bigquery:delete_opted_out_end_user_data["real-end-users-id"]