In today’s newsletter: Celebrations erupted in Brazil last night after Lula’s triumph over far-right incumbent Bolsonaro. What could the next four years look like – and will Bolsonaro concede defeat peacefully?

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After an election period marred by disinformation and threats of violence, Brazil’s leftist former president Luiz Inácio Lula da Silva – known as Lula – narrowly defeated far right incumbent Jair Bolsonaro by two percentage points in an astonishing political comeback. In a parallel universe, Lula’s once unthinkable, political revival – from the top of Brazilian politics, to prison and back to the presidency – would be the story of the hour. Instead all eyes are elsewhere.

Police | Met police chief, Sir Mark Rowley, has said that the gang violence matrix, a controversial Metropolitan police list of alleged gang members that mainly targeted black men, needs to be “radically reformed”. Amnesty International branded the list part of a “racialised war” on gangs. Rowley has already removed more than 1,000 young men from the list.

South Korea | President Yoon Suk-yeo has declared a state of national mourning and ordered an investigation after a fatal crowd crush during Halloween celebrations. More than 150 people were killed after people surged through a narrow alleyway in a busy area of Seoul.

Cop27 | Rishi Sunak’s decision not to attend UN climate talks in Egypt this week has prompted an outpouring of anger from countries around the world. “It seems as if they are washing their hands of leadership,” said Carlos Fuller, Belize’s ambassador to the UN.

NHS | The NHS has not received any of the funding from Thérèse Coffey’s £500m emergency fund. The money was supposed to help get thousands of medically fit patients out of hospital into their own home or a care home to prevent the NHS from becoming overwhelmed in the winter.

National security | UK government ministers risk creating “wild west” conditions in matters of national security through the increased use of personal email and phones to conduct confidential business, intelligence experts and former officials have warned.

Luiz Inácio Lula da Silva, the former leftist president, has reclaimed the leadership and vowed to reunify his country

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• Profile: the rise and fall and rise again of Lula

Brazil’s former leftist president, Luiz Inácio Lula da Silva, has sealed an astonishing political comeback, beating the far-right incumbent Jair Bolsonaro in one of the most significant and bruising elections in the country’s history.

With 99.97% of votes counted, Silva, a former factory worker who became Brazil’s first working-class president exactly 20 years ago, had secured 50.9% of the vote. Bolsonaro, a firebrand who was elected in 2018, received 49.10%.

The Superior Electoral Court of Brazil has announced that Lula is elected president, after a nailbiting count that went to the wire. Find out how every state voted

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Brazil’s president is elected directly by the people; any candidate with more than 50% of the vote wins, and there is no role in the election for parliament and no electoral college.

Tens of millions of progressives turn out in hopes of unseating Jair Bolsonaro from presidency after bitterly fought campaign

The future of one of the world’s largest democracies and the Amazon rainforest was on a knife-edge as Brazil held its most important election in decades and its far-right president, Jair Bolsonaro, battled to cling to power amid claims that security forces were engaged in a pro-Bolsonaro voter suppression campaign.

Polls on the eve of the election had showed Bolsonaro trailing his leftist rival, the former president Luiz Inácio Lula da Silva, by a margin of four to eight percentage points, although first-round polls had underestimated support for the incumbent. Lula won the recent first round by about 6mvotes but fell just short of the overall majority that would have guaranteed him an outright win.