The members of the research in false news have issued a notice to both ex-Cambridge Analytica boss Alexander Nix and Dominic Cummings, former director of campaign to Vote off.
They appear before the Digital, Culture, Media and Sport committee,
They had said that they could not occur, as the surveys conducted by the office of the Information Commissioner and the Electoral Commission.
But the two agencies have confirmed that appears, would not interfere with their inquiries.Serious inconsistencies
The Mps are looking at how consulting firm Cambridge Analytica collected the data of millions of Facebook users in the world.
Damian Collins MP, chair of the commission, said: “We are summoning Mr Nix in Parliament to get the truth about an extremely serious problem that affects more than one million UK Facebook users, and potentially the voters in elections across the world.
“Mr Nix has been given multiple opportunities to appear and to clarify his testimony before the committee, but now we expect to appear in court on June 6.
“There are serious inconsistencies between Mr. Nix’s original testimony, of 27 February, and the evidence received pursuant to the investigation ever since.”
Based in london, Cambridge Analytica, which announced that it would close earlier this month is accused of acquiring data from 87 million Facebook profiles for use in political campaigns. The company has denied any wrongdoing.Parliamentary contempt
There are also questions about the links between Cambridge Analytica and the Vote to Quit the campaign.
The Vote to Leave spent £2.7 m on services of Canadian digital agency AIQ in the race until June 2016 eu referendum, and the company has admitted that it has also conducted work in Cambridge Analytica parent company of SCL.
Mr Collins said: “We hope that Mr. Cummings would have responded positively to our request, in view of the allegations made against the Vote to Leave the countryside in the course of our investigation.”
He added: “May 22 will be the opportunity to clarify the allegations about the illegality of the coordination of the EU referendum campaigns, campaign spending, and abuse of personal data.”
If one of the two men do not appear, the committee may submit the issue to the Parliament.
“This could lead to a decision of a contempt of Parliament has been committed,” Mr. Collins said.
Meps were also keen to interview Facebook founder Mark Zuckerberg, after he refused a request to appear in court, sending the place of Mike Schroepfer, the social network’s chief technology officer.
The deputies determined that he failed to respond to 40 questions.Canada link
The committee is due to hear evidence from Jeff Silvester, of the AIQ, the next week.
According to Facebook, the testimony of the Deputies, AIQ has spent $ 2 million (£1.5 m) of advertising on its platform during the brexit referendum.
In a separate press release, The Voice Just of the Project, which has been put in place to represent those whose data have been collected, is the preparation of a claim for damages against Facebook.
In case of success, the social network could faces damages of the order of a billion pounds.