BORIS Johnson could face losing his seat if the Privileges Committee imposes a suspension of 10 sitting days or more.
The cross-party committee is examining whether the Prime Minister committed a contempt of Parliament by misleading MPs over the partygate scandal.
And he could face a recall process that could then trigger a by-election if he is suspended from the House for 10 sitting days or more.
A recall election is a procedure by which voters can remove an elected official from office through a referendum before that MP's term has ended.
Commons Speaker Sir Lindsay Hoyle confirmed that the committee’s findings would fall within the remit of the Recall of MPs Act, following advice from a leading lawyer.
The Privileges Committee - which has seven members - also insisted its inquiry will go ahead despite Johnson’s resignation as Tory leader and his expected departure from No 10 in September.
The committee said “some have suggested” the inquiry is no longer necessary.
“Our inquiry, however, is into the question of whether the House was misled, and political developments are of no relevance to that," the committee said.
“The House charged the committee with this task and we are obliged to continue with it.”
The committee's investigation is a separate inquiry to those that were conducted by the Metropolitan Police and by the senior civil servant Sue Gray into partygate.
People have until July 29 to submit evidence to the inquiry, with oral evidence sessions expected to take place in the autumn.
Johnson has been told to hand over piles of evidence. The committee has asked for every photo taken at a partygate event including those by the Prime Minister’s official photographer, any and all resignation letters from No 10 staff, and all legal advice Johnson was offered amid the scandal.
Downing Street entry logs and prime ministerial diaries for certain dates have also been requested by MPs.
Simon Case, the highest ranking civil servant in the UK, has also been asked to provide any documents or evidence in his possession with a deadline of August 15.
The request comes from Harriet Harman, a Labour MP and former minister who is chairing the Privileges Committee.
