Parliamentarians vote between the last two John Berkov successor candidates as speaker, in what is the first election for the post after more than a decade.
In the third round of voting, Sir Lindsay Hoyle received the most votes at 267, followed by Chris Bryant with 1
Lecturer maintained order in the Commons debate and urged MPs to speak.
The result of the final vote is expected around 20:00 GMT.
Seven candidates initially applied.
After receiving the fewest votes, Dam Rosie Winterton had to leave the race in the second round of voting, and Harriet Harman voluntarily withdrew.
Labor MP Meg Hillier and Conservative Sir Edward Lay were knocked out in the first round of the contest after receiving 10 and 11 votes, respectively.
Mr Berkov stepped down last week after a busy and often controversial decade in the chair of the chair. His resignation as a Buckingham MP was formally confirmed on Monday.
- LIVE: The Speaker Contest is in progress
What are the candidates' pitches?
The first to speak was Lady Rosey Winton of Labor. She said the chairman's task was "not to dominate production or talk about Parliament" and promised to "quench the flames from pouring gasoline on them".
Another Labor MP Chris Bryant said he believed in "a speaker who would stand by the rules, who is completely impartial and who knows Erskine May [the parliamentary rule book] back in front," adding: "I made him lie down in his bed . "
He also promised to end the clap in the camera and" arrange wi-fi "- promises that he himself received with applause from listeners.
Conservative Sir Edward Lay said that the lecturer should" immerse his character in the work "and be a" quiet voice. "
He also said that the preservation of parliamentary buildings should be done" in the interest of our money administrator – the taxpayers. "" We cannot waste billions of pounds, "he said. 19659004] The current Vice-President Eleanor Ling expressed sadness at the number of MPs who decided not to vote. They were running again in the December elections and promised to run for all members if they were elected.
She said that Parliament should "escape the hierarchical structures that allow bullying to take root."
on the issue of harassment, Meg Hillier of Labor said lawmakers are needed to protect staff in the House, warning the harassment "will become the next spending scandal."
Mr Berkov was criticized for not taking any further action to tackle the Commons harassment and harassment charges, and he himself was accused of mistreating several employees, which he denied.
Another current Vice-President, Sir Lindsey Hoyle, said he had introduced security measures for MPs "so that we could feel safe."
"I will not miss you," he promised the deputies.
Former Labor Party deputy leader Harriet Harman made his last chance by promising to take a fourth alternate made up of one of the smaller parties.
She stated that she had an "incomparable record of reform", pointing to her campaign to allow pregnant MPs and new parents to vote through a proxy.
Applicants have made their own land under the eyes of former spokeswoman Betty Butroyd. Labor MP Stella Cresy received a photo of the Baroness sitting in the gallery
How will the vote develop?
Candidates need the support of at least 12 MPs, three of whom must be from one country in order to participate.
MPs have 20 minutes to vote by secret ballot. It will take them about 45 minutes.
If no candidate receives more than half of the votes, the individual who received the least votes will be dropped, as will anyone who receives less than 5% of the total number of votes.  After each round, there will be a 10-minute period for candidates to withdraw.
Deputies will continue to vote until one candidate receives more than half the votes. The process is led by Ken Clark, who, as the father of the House, is a longtime member of the borough.
Who was in the world?
The seven contenders at the start of the race were:
- Chris Bryant – Former Minister and Leader of the Shadow Commons; Ronda Labor MP since 2001
- Harriet Harman – Former Minister and Deputy Labor Leader; 1982 Labor MP for Peckham and his successor Camberwell constituency
- Meg Hillier – Chairman of the Public Accounts Committee and former minister; Labor MP for Hackney South and Schoreditch since 2005.
- Sir Lindsey Hoyle – Elected Labor MP for Chorley in 1997; Elected Vice-President in 2010.
- Dam Eleonor Lying – Elected Conservative MP to remove forest in 1997; elected Vice-Chairman in 2013
- Sir Edward Lee – Member of the Conservatives in Gainsborough since 1983; former Chairman of the Committee on Public Accounts
- Dam Rosie Winterton – elected Labor MP for Doncaster Central in 1997; former head of labor; Elected Vice-President in 2017.
BBC Parliamentary correspondent Mark D & Arsie said that most observers believe Sir Lindsay – who has been Mr Berkov's senior deputy for years – is a presenter.
"As chairman of Ways and Means, he chairs the budget debate and selects amendments to the commissioning phase of the bills and has many opportunities to demonstrate his authority," our correspondent says.
Sir Lindsay says MPs support him. included Conservative Charles Walker, who was one of Mr Berkov's major allies during his term, former sports minister Tracy Crouch and Brexit MP Caroline Flint.
It got an early boost when former Conservative Minister Shilesh Vara, one of the outsiders in the competition, said he was pulling and would vote for his Labor colleague.
What is Speaker's role?
The role of the speaker has been subject to increasing scrutiny over the last few years – and Mr Berkov is praised for both increasing the influence of MPs and critics for expanding parliamentary rules.
Some also accuse him of not being impartial with respect to Brexit.
The Speaker is responsible for choosing the amendments that can be voted on – a power that has proven particularly important in the Brexit process.
was also responsible for complying with parliamentary rules and Mr Berkov twice angered some MPs by refusing to allow the government to vote on a previously rejected Brexit deal.
The chairman may also allow MPs to ask urgent questions by which government ministers are called to the House of Commons on a time sensitive or important issue.
Over the years, Mr. Berkov has dramatically increased the number of urgent questions asked.
Analysis: Easy Victory or Tactical Battle
By Mark D'Arcy, BBC Parliamentary Correspondent
And what can MPs want in a new chairman? First, there seems to be an appetite for a different style – ending Berkovi's magnificence and these five-minute calls for brevity, as well as ending the type of clashes with MPs the injured speaker was inclined to do.  Remember his face-to-face collision with then-whip chief Patrick McLaughlin, or this week's spat with longtime Berkov critic Andrew Bridgen?
Then there was much more concern about Speaker's swift powers to make rules in Commons, a power that saw him authorize changes to the Business of the House proposals that had to be taken "immediately" – which many lawmakers believed that cannot be modified.
Given that no party has a majority in the House, the winning candidate will be the one most capable of reaching party lines and building a majority of factions of major parties, members of smaller parties and their personal supporters.
Those who view themselves as party-goers in the first place may find it difficult to do so.
- Read Mark's full analysis