https://techcrunch.com/2017/11/29/uber-says-2-7m-uk-users-affected-by-2016-data-breach/

Uber’s October 2016 data breach affected some 2.7 million UK users, it has now been revealed.

On Friday the government said it had been informed by Uber that UK users were affected by the 2016 breach, though it did not disclose the number at that stage.