As other MPs seek Early Day Motion demanding inquiry
But PM says she has 'confidence' in John Bercow as Speaker
Theresa May has called for crackdown on social media abuse.
The five things you need to know about politics today.
He said journalists involved in the leak 'should be in prison'.
"This PC (political correctness) has gone to such an extreme these days".
About Newsnight
Newsnight is a daily BBC Television current affairs programme which specialises in analysis and often robust cross-examination of senior politicians. Jeremy Paxman was its main presenter for over two decades and the show is now hosted by Evan Davis, Emily Maitlis and Kirsty Wark