LONDON — European Union and British regulators said Friday that they were beginning separate antitrust inquiries into Facebook, broadening their efforts to rein in the world’s largest technology companies.The investigations by the European Commission, the executive arm of the 27-nation bloc, and Britain’s Competition and Markets Authority, take aim at a key business strategy used by Facebook and other large tech companies: to use their size and power in one area to enter others. Amazon took its position as the largest online retailer to become a major player in video streaming. Apple leveraged the iPhone to be one …
