https://www.reuters.com/article/us-facebook-cambridgeanalytica/uk-investigates-facebook-over-data-breach-to-raid-cambridge-analytica-idUSKBN1GW0WX >Britain is investigating whether Facebook did enough to protect data after a whistleblower said a London-based political consultancy hired by Donald Trump improperly accessed information on 50 million Facebook users to sway public opinion.