Facebook's Marketplace in EU and UK antitrust crosshairs

FILE PHOTO: The Facebook logo is displayed on a mobile phone in this picture illustration taken December 2, 2019. REUTERS/Johanna Geron/Illustration/File Photo

BRUSSELS/LONDON (Reuters) -Europe and Britain launched formal antitrust investigations into Facebook on Friday to determine if the world's largest social network was using customer data to unfairly compete with advertisers, in a new assault on its business model.

The separate moves open new fronts in Europe against the tech giant, whose platforms are used regularly by almost 3 billion people and which is accused of using its vast trove of ad data to better compete with companies from which it also collects data.