SENIOR MPs from the UK and Canada have joined forces to demand Mark Zuckerberg explain Facebook’s failure to protect user data and stop the spread of propaganda online.

Commons Culture committee chair Damian Collins and his Canadian counterpart Bob Zimmer want the Facebook chief to appear at a “international grand committee” on disinformation and fake news to be held at the end of November.

2 Mark Zuckerberg has been called to explain Facebook's failure to protect its users from fake news, propaganda and data hackers Credit: Getty

In a letter to him they said: “Over the past year, our committees have both sought evidence from a Facebook executive with sufficient authority to give an accurate account of recent failures of process, including the recent Cambridge Analytica scandal and subsequent data breaches.

“You have chosen instead to send less senior representatives, and have not yourself appeared, despite having taken up invitations from the US Congress and Senate, and the European Parliament.”

The social network boss has until November 7 to respond.

It emerged last night fake political ads had slipped through a new Facebook “transparency” net designed to stop fake ads online.

2 Facebook lost one million users in Europe over the past three months Credit: Alamy

The social media giant lost one million users in Europe in the last three months, according to their financial results.

The number of Europeans logging onto the site every day dropped from 279 to 278 million and monthly European users fell from 376 to 375 million.

But total global user numbers continue to slowly rise, with more than 2.2 billion people using the platform every month.

Facebook's Mark Zuckerberg apologises to EU lawmakers over data leak at the European Parliament

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