He was the Mayor who revelled in the glory of hosting the 2012 London Olympics, and the man who led the Conservatives to a whopping election victory on the back of his mission to “get Brexit done.”
But Boris Johnson’s time as Prime Minister was marred by his handling of the coronavirus pandemic and a steady stream of ethics allegations. In 2022, he was forced from power, and on June 9, he quit as a lawmaker, jumping before he could be sanctioned over lockdown-breaching parties during the pandemic.
Here is a timeline of events relating to Mr. Johnson’s political career:
2001-2008: Serves as a member of Parliament in the House of Commons representing the constituency of Henley.
2008-2016: Serves as London Mayor, overseeing 2012 London Olympics.
2016: Co-leader of the campaign to take Britain out of the European Union, in opposition to then-Prime Minister David Cameron, a fellow Conservative. Cameron resigns after voters approve Brexit in a national referendum on June 23, 2016.
2016-2018: Serves as Foreign Secretary under Mr. Cameron’s successor, Prime Minister Theresa May. Mr. Johnson resigns in July 2018 in opposition to Ms. May’s strategy for a “soft” Brexit that would maintain close ties with the E.U.
June 7, 2019: Theresa May resigns as Conservative Party leader over her failure to persuade Parliament to back the Brexit agreement she negotiated with the E.U. The party is split between those who back Ms. May and hard-liners, led by Mr. Johnson, who are willing to risk a no-deal Brexit in order to wring concessions from the E.U.
July 23, 2019: Mr. Johnson is elected Conservative Party leader in a vote by party members. He takes office as Prime Minister the next day, inheriting a minority government that relies on votes from Northern Ireland’s Democratic Unionist Party to pass legislation. Mr. Johnson insists Britain will leave the E.U. on Oct. 31, with or without a deal.
Aug. 28, 2019: Mr. Johnson announces he will shut down Parliament until mid-October, giving opponents less time to thwart a no-deal Brexit.
Sept. 3, 2019: Twenty-one rebel Conservative Party lawmakers support legislation requiring the government to seek an extension of Brexit negotiations if it can’t negotiate an agreement with the E.U. The measure passes and the rebels are expelled from the party.
Sept. 5, 2019: Mr. Johnson asserts he would rather be “dead in a ditch” than ask the E.U. for another extension.
Sept. 24, 2019: U.K. Supreme Court rules government’s suspension of Parliament was unlawful.
Oct. 19, 2019: Mr. Johnson asks the E.U. to delay Brexit again. New deadline set for Jan. 31.
Nov. 6, 2019: Parliament is dissolved and early elections are set for mid-December as Mr. Johnson seeks a mandate for his Brexit strategy.
Dec. 12, 2019: Mr. Johnson wins an 80-seat majority in the general election, giving him the backing to push through Brexit legislation. The victory makes Mr. Johnson the most electorally successful Conservative leader since Margaret Thatcher.
Jan. 23, 2020: The Brexit deal becomes law after approval by U.K. Parliament. European Parliament approves the deal six days later.
March 23, 2020: Mr. Johnson places U.K. in first lockdown due to COVID-19.
April 5, 2020: Mr. Johnson hospitalised and later moved to intensive care with COVID-19. He is released from the hospital on April 12, thanking the nurses who sat with him through the night to make sure he kept breathing.
Nov. 3-4, 2021: Mr. Johnson’s government orders Conservative lawmakers to support a change in ethics rules to delay the suspension of Owen Paterson, a Johnson supporter who had been censured for breaching lobbying rules. The measure passes. A day later, facing an angry backlash from lawmakers of all parties, Mr. Johnson reverses course and allows lawmakers to vote on Mr. Paterson’s suspension. Mr. Paterson resigns.
Nov. 30, 2021: Allegations surface that government officials attended parties in government offices during November and December 2020 in violation of COVID-19 lockdown rules. The scandal grows to reports of more than a dozen parties. Mr. Johnson denies the allegations, but opposition leaders criticize the government for breaking the Law as people across the country made sacrifices to combat the pandemic.
Dec. 8, 2021: Mr. Johnson authorises investigation into the scandal, dubbed “Partygate.” Pressure builds for a leadership challenge, but fizzles.
April 9: Mr. Johnson meets Ukrainian President Volodymyr Zelenskyy in Kyiv, pledging a new package of military and economic support. Mr. Johnson's staunch support for Ukraine after Russia's invasion helps bolster Mr. Johnson and his supporters, who argue the government should not focus on domestic political squabbles.
April 12: Mr. Johnson is fined 50 pounds ($63) for attending one of the lockdown parties. Mr. Johnson apologises but insists he didn’t know he was breaking the rules.
May 22: Findings of the “Partygate” investigation are published, detailing 16 gatherings at Mr. Johnson’s home and office and other government offices between May 2020 and April 2021, at a time when millions of people were unable to see friends and family.
June 6: Mr. Johnson narrowly wins a vote of no confidence, with Conservative lawmakers voting 211—148 to back him. The scale of the revolt — some 41% voted against him — shakes his grip on power.
June 15: Christopher Geidt quits as ethics adviser to Mr. Johnson, accusing the Conservative government of planning to flout conduct rules.
June 24: Mr. Johnson’s Conservatives lose two former strongholds to opposition parties in special elections.
June 29: Parliament’s cross-party Privileges Committee issues a call for evidence for a probe into whether Mr. Johnson misled Parliament over lockdown parties.
June 30: Lawmaker Chris Pincher resigns as Conservative Deputy Chief Whip amid allegations he assaulted two guests at a private members club in London. Previous sexual misconduct allegations emerge about Mr. Pincher. Questions swirl about whether Mr. Johnson knew about the claims when Mr. Pincher was given the job.
July 5: Mr. Johnson apologises for his handling of the Mr. Pincher scandal and says he had forgotten about being told of the allegations. Two of Mr. Johnson’s most senior Cabinet ministers, Treasury Chief Rishi Sunak and Health Secretary Sajid Javid, quit the government.
July 6: Some three dozen junior Ministers resign from the government, attacking Mr. Johnson’s leadership.
July 7: Mr. Johnson resigns as Conservative Party leader, but plans to remain as Prime Minister while the leadership contest is held.
Sept 6: Mr. Johnson leaves office, replaced by Liz Truss.
Oct. 25: Mr. Sunak replaces Ms. Truss as Prime Minister after her tax-cutting economic plans caused turmoil on financial markets.
November 2022: Mr. Johnson begins stepping up speaking engagements that take him around the world from India to Nigeria to Singapore to the United States. During the current Parliamentary term, he reports earning 2.7 million pounds ($3.4 million) from speaking engagements.
March 3, 2023: A U.K. Parliamentary committee says evidence suggests Mr. Johnson repeatedly misled Parliament about his knowledge of lockdown-breaking parties at his Downing Street office.
March 22: Mr. Johnson insists “hand on heart” that he never lied to lawmakers about rule-breaking government parties, mounting a robust defence at a hearing that could damage or even end his tumultuous political career.
June 9, 2023: Mr. Johnson resigns his Parliamentary seat after receiving report on lockdown plans.