Publicist Max Clifford and former editor of the News of the World and Hello! Phil Hall will take questions from MPs and Lords this afternoon.

They will appear before the joint committee on privacy and injunctions, which is currently questioning social media groups.

The four currently taking questions are: Lord Allan of Hallam, director of policy in Europe for Facebook; DJ Collins, vice president of global policy and communications at Google; Collins’ colleague at the internet giant Daphne Keller, who is associate general counsel at Google; and Colin Crowell, head of global public policy at Twitter.

The joint committee on privacy and injunctions was set up in May last year by prime minister David Cameron, with the aim, as outlined by attorney general Dominic Grieve, of looking at whether the current system of privacy and injunctions is working “and to consider whether we might make any changes that would make thing work better”.

The establishment of the committee followed the move by MP John Hemming to use parliamentary privilege to name a footballer at the centre of a privacy injunction, which had prevented the press from reporting on the matter but had seen speculation on sites such as Twitter.

Clifford and Hall are due to face questions at 3.15pm and can be viewed on Parliament TV