https://www.theguardian.com/technology/2017/nov/29/uber-security-breach-london-sadiq-khan-users

London mayor Sadiq Khan says ride-hailing service must take action after ‘catastrophic’ incident

Uber has admitted that 2.7 million people in the UK were affected by a 2016 security breach that compromised customers’ information, including names, email addresses and mobile phone numbers.