will look into the claim and write to the committee to explain what the firm's position is.

The hearing is the first time politicians from around the world have taken part in such an international hearing in the British Parliament since 1933.

They have travelled to hold a special session of the inquiry, which was set up to investigate fake news on Facebook after the 2016 EU referendum but widened following revelations about Cambridge Analytica and claims Russia used the social network to spread disinformation and sow chaos.

Lord Allan was challenged over whether Facebook poses a threat to democracy.

He said: 'What we want are free and fair elections.'

He said that Facebook did spot attempts to interfere in the US elections, but downplayed the impact it had on the outcome.

He said:restricting the app's access to users' data.

As part of its case, Six4Three's lawyers were handed internal Facebook documents - including executives' email correspondence with Mr Zuckerberg - but they were 'sealed' by a court in California, meaning they are kept secret.

It believed the documents show how the firm created and effectively drew attention to a privacy loophole later used by Cambridge Analytica to collect the data of millions of users.

Six4Three managing director Ted Kramer gave the documents to British authorities after being warned he could be banned from leaving the UK if he refused.

In an extraordinary sequence of events, he ignored three demands for the emails before being personally served by a Serjeant at Arms and meeting Mr Collins in his Commons office.

Charlie Angus, a politician from Canada,(pictured)