I'm proud of my parliament today (and it's not often I can say that), even if in other parts they're tearing themselves apart.
Parliament is sovereign. Facebook ignored Parliament. That is tantamount to blowing off an American court order.
More pointedly, Facebook has broken their agreements on keeping WhatsApp and Facebook data separate. These e-mails further show Onavo and Facebook conspiring to hide their intent around data collection users, which likely breaks British privacy and honest trade law.
1. In the US, the president (executive) can declassify any classified information, the DOJ or judiciary may publicize (discovered) internal documents for trials/indictments before guilt is established (note: IANAL). In the UK, Parliament is supreme to the executive and judiciary.