Parliament has used its legal powers to seize internal Facebook documents in an extraordinary attempt to hold the US social media giant to account after chief executive Mark Zuckerberg repeatedly refused to answer MPs’ questions. The cache of documents is alleged to contain significant revelations about Facebook decisions on data and privacy controls that led to the Cambridge Analytica scandal. It is claimed they include confidential emails between senior executives, and correspondence with Zuckerberg. Damian Collins, the chair of the culture, media and sport select committee, invoked a rare parliamentary mechanism to compel the founder of a US software company,...