It is expected there will around eight sessions in total.
Members of the committee, chaired by Labour MP Tony Wright, are due to meet to decide who to invite to give evidence. The spokeswoman said the committee would call ‘a combination of people who have submitted written evidence and people who the committee wants to hold to account'.
The MPs are certain to call the Association of Professional Political Consultants (APPC). The APPC plans to put up chair Gill Morris, alongside former presidents Michael Burrell and Warwick Smith.
It is also likely to call agencies that have refused to join the APPC, such as DLA Piper, Global Government Relations and Bell Pottinger Public Affairs.