Fiona Onasanya has lost her seat in the House of Commons after voters in her constituency signed a recall petition demanding her removal.
The disgraced independent MP, who was jailed for perverting the course of justice, becomes the first MP ever to be removed by the recall process, introduced by David Cameron in 2015.
Around 19,261 people signed the petition, which is over 27 per cent of registered voters in the area, and well above the 10 per cent threshold required for a recall.
Confirming the recall petition had been successful, Commons speaker John Bercow said: "Fiona Onasanya is no longer the member for Peterborough and the seat is accordingly vacant.
"She can therefore no longer participate in any parliamentary proceedings as a Member of Parliament."
The successful petition now triggers a by-election in the Peterborough constituency, in which Ms Onasanya is permitted to stand.
Responding to the news, Labour chairman Ian Lavery, said: "The people of Peterborough clearly agree that Fiona Onasanya is not fit to be their MP and we're delighted they will now have the chance to vote for a Labour MP."
And Nigel Farage has announced that his new Brexit Party would contest the by-election.
He tweeted: "I can confirm that @brexitparty_uk will fight the Peterborough by-election. We will give it our best shot."