In the UK, Parliament is sovereign. FB had repeatedly refused to appear before a parliamentary committee to give evidence in the Cambridge Analytica case.
Now, I'm not totally certain of the precise legal position, but because of its sovereignty, Parliament can act in a quasi-judicial way, so in effect, FB's actions can be seen as roughly equivalent to refusing a subpoena.
FB's refusal authorised Parliament to seize the evidence they needed while the exec was on UK soil. FB have only themselves to blame.
Now, I'm not totally certain of the precise legal position, but because of its sovereignty, Parliament can act in a quasi-judicial way, so in effect, FB's actions can be seen as roughly equivalent to refusing a subpoena.
FB's refusal authorised Parliament to seize the evidence they needed while the exec was on UK soil. FB have only themselves to blame.