I'm not that familiar with the UK legal sphere - how and why is this an ultimatum and what happens if Zuckerberg doesn't appear before the committee?
> Historically, those found guilty of contempts could be fined or imprisoned, but those sanctions have not been used by the Commons since 1666 and 1880 respectively. For all sorts of practical, legal and constitutional reasons, it is highly doubtful that the modern House would seriously consider this.
I am fairly sure that they cant just put a motion of attainder on the order paper any more :-) But if something really damming came out in the windrush scandal (forcibly repatriating BAME 70 year old citizens).
They could get rid of the current prime minister in 24-48 hours.