British Prime Minister Boris Johnson will face a vote of confidence on Monday

British Prime Minister Boris Johnson will face a vote of confidence on Monday, triggered by discontented lawmakers in his own party.

Graham Brady, chairman of the 1922 Committee of backbench lawmakers, said in a statement Monday

that the number of Conservative Party parliamentarians calling for the vote had reached the necessary threshold.

The vote will be held between 6 p.m. and 8 p.m. local time on Monday.

If 180 Conservative lawmakers -- a simple majority -- vote against Johnson,

he will cease to be leader of the governing Conservative Party and will be removed from office,

less than three years after winning a general election in a landslide.

If Johnson wins the vote, he will remain both as leader of the party and as Prime Minister.

Johnson's premiership has been shaken by the so-called "Partygate" scandal.