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Facebook scandal 'hit 87 million users' Facebook scandal 'hit 87 million users'
(35 minutes later)
Facebook has said it now believes up to 87 million people's data was improperly shared with the political consultancy Cambridge Analytica. Facebook has said it now believes up to 87 million people's data was improperly shared with the political consultancy Cambridge Analytica - many more than previously disclosed.
The BBC has been told that about one million of them are UK-based. The BBC has been told that about 1.1 million of them are UK-based.
The overall figure had been previously quoted as being 50 million by the whistleblower Christopher Wylie.The overall figure had been previously quoted as being 50 million by the whistleblower Christopher Wylie.
The details were revealed in a blog by the tech firm's chief technology officer, Mike Schroepfer.The details were revealed in a blog by the tech firm's chief technology officer, Mike Schroepfer.
It was published several hours after the US House Commerce Committee announced that Facebook's founder, Mark Zuckerberg, would testify before it on 11 April. The BBC has also learned that Facebook now estimates that about 305,000 people had installed the This Is Your Digital Life quiz that had made the data-harvesting possible. The figure previously suggested had been 270,000.
The tech firm has faced intense criticism after it emerged that it had known for years that Cambridge Analytica had harvested data from millions of its users, but had relied on the London-based firm to self-certify that it had deleted the information. About 97% of the installations occurred within the US. However, just over 16 million of the total number of users affected are thought to be from other countries.
A spokeswoman for the UK's Information Commissioner's Office told the BBC that it was continuing to assess and consider the evidence before deciding what steps to take.
Facebook has faced intense criticism after it emerged that it had known for years that Cambridge Analytica had collected data from millions of its users, but had relied on the London-based firm to self-certify that it had deleted the information.
Channel 4 News has since reported that at least some of the data in question is still in circulation despite Cambridge Analytica insisting it had destroyed the material.Channel 4 News has since reported that at least some of the data in question is still in circulation despite Cambridge Analytica insisting it had destroyed the material.
The latest revelations came several hours after the US House Commerce Committee announced that Facebook's founder, Mark Zuckerberg, would testify before it on 11 April.
Apps alertApps alert
Mr Schroepfer also detailed new steps being taken by Facebook in the wake of the scandal.Mr Schroepfer also detailed new steps being taken by Facebook in the wake of the scandal.
They include:They include:
Facebook has also published proposed new versions of its terms of service and data use policy.Facebook has also published proposed new versions of its terms of service and data use policy.
The documents are longer than the existing editions in order to make the language clearer and more descriptive.The documents are longer than the existing editions in order to make the language clearer and more descriptive.