The former energy minister had increased his share of the vote at each of the four elections in the past 13 years, from 40% in 2010 to 49% in 2015, 55% in 2017 and 56% in 2019.
Sir Keir said: “This is a fantastic result in Kingswood that shows people are ready to put their trust in a Labour government.
“By winning in this Tory stronghold, we can confidently say that Labour is back in the service of working people and we will work tirelessly to deliver for them.
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“To those who have put their trust in us, you can be safe in the knowledge that the Labour Party will deliver on your priorities. Labour will give Britain its future back.”
Notably, Reform UK – previously the Brexit Party – came in third place, winning 2,578 votes – the first time their vote share at a by-election has surpassed 10%.
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This means that the total of the Conservative and Reform vote equates to more than the Labour vote.
The Reform UK party – including Nigel Farage – have said that they are gunning for the Conservative vote in this and other elections.
A Labour source told Sky News they believed they had won the seat at around 1.30am – the results were announced at around 1.50am.
Before 2010, Labour had won the seat at every general election since 1992.
The turnout this time was 24,905 – which equates to around 37.1% of eligible voters in the constituency.
This is a significant drop of 34 percentage points from the 2019 general election.
To win, Labour needed a swing in the share of the vote of 11.4 percentage points – equivalent to a net change of 12 in every 100 people who voted Conservative in 2019 switching sides.
Provisional calculations show the swing ended up being 16.4 from the Conservatives to Labour.
In total, the Conservative Party’s vote share fell by 21.3 percentage points, meanwhile the Labour Party’s vote increased by 11.5 percentage points.
Image: Votes are counted for the Kingswood by-election at the Thornbury Leisure Centre, Gloucestershire. Pic: PA
The Liberal Democrats vote fell by 3.4 points, and the Green Party went up by 3.4 points.
Speaking after his election, Mr Egan said: “Thank you for giving me your trust and for allowing me to serve the community I’m from.
“It’s a trust that I promise to repay, to show that politics can be different and can make a difference.”
He added: “Fourteen years of Conservative government have sucked the hope out of our country. There’s a feeling that no matter how hard you work, you just can’t move forward, and with Rishi’s recession we are left once again paying more and getting less.”
While the Kingswood seat is disappearing at the next general election due to boundary changes, Mr Egan is standing for Bristol North East, which contains much of the same electorate.
Mr Bromiley left the hall where the vote was being counted within seconds of the declaration, with the door shut behind him to prevent journalists from following him.
Safeguarding minister Jess Phillips has told Sky News that councils that believe they don’t have a problem with grooming gangs are “idiots” – as she denied Elon Musk influenced the decision to have a national inquiry on the subject.
The minister said: “I don’t follow Elon Musk’s advice on anything although maybe I too would like to go to Mars.
“Before anyone even knew Elon Musk’s name, I was working with the victims of these crimes.”
Mr Musk, then a close aide of US President Donald Trump, sparked a significant political row with his comments – with the Conservative Party and Reform UK calling for a new public inquiry into grooming gangs.
At the time, Ms Phillips denied a request for a public inquiry into child sexual exploitation in Oldham on the basis that it should be done at a local level.
But the government announced a national inquiry after Baroness Casey’s rapid audit on grooming gangs, which was published in June.
Asked if she thought there was, in the words of Baroness Casey, “over representation” among suspects of Asian and Pakistani men, Ms Phillips replied: “My own experience of working with many young girls in my area – yes there is a problem. There are different parts of the country where the problem will look different, organised crime has different flavours across the board.
“But I have to look at the evidence… and the government reacts to the evidence.”
Ms Phillips also said the home secretary has written to all police chiefs telling them that data collection on ethnicity “has to change”, to ensure that it is always recorded, promising “we will legislate to change the way this [collection] is done if necessary”.
Operation Beaconport has since been established, led by the National Crime Agency (NCA), and will be reviewing more than 1,200 closed cases of child sexual exploitation.
Ms Phillips revealed that at least “five, six” councils have asked to be a part of the national review – and denounced councils that believed they don’t have a problem with grooming gangs as “idiots”.
“I don’t want [the inquiry] just to go over places that have already had inquiries and find things the Casey had already identified,” she said.
She confirmed that a shortlist for a chair has been drawn up, and she expects the inquiry to be finished within three years.
Ms Phillips’s comments come after she announced £426,000 of funding to roll out artificial intelligence tools across all 43 police forces in England and Wales to speed up investigations into modern slavery, child sex abuse and county lines gangs.
Some 13 forces have access to the AI apps, which the Home Office says have saved more than £20m and 16,000 hours for investigators.
The apps can translate large amounts of text in foreign languages and analyse data to find relationships between suspects.
Her comments followed the departure of the prince and several others from the organisation in March.
They had asked her to step down, alleging it was in the “best interest of the charity”.
Dr Chandauka told Sky News that Harry had “authorised the release of a damaging piece of news to the outside world” without informing her or Sentebale directors.
The Duke and Duchess of Sussex declined to offer any formal response.
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4:43
Why was Prince Harry accused of ‘bullying’?
‘Strong perception of ill-treatment’
The Charity Commission said it was reporting after a “damaging internal dispute emerged” and has “criticised all parties to the dispute for allowing it to play out publicly”.
That “severely impacted the charity’s reputation and risked undermining public trust in charities more generally”, it said.
But it found no evidence of “widespread or systemic bullying or harassment, including misogyny or misogynoir at the charity”.
Nevertheless, it did acknowledge the “strong perception of ill-treatment felt by a number of parties to the dispute and the impact this may have had on them personally”.
It also found no evidence of “‘over-reach’ by either the chair or the Duke of Sussex as patron”.
‘Confusion exacerbated tensions’
But it was critical of the charity’s “lack of clarity in delegations to the chair which allowed for misunderstandings to occur”.
And it has “identified a lack of clarity around role descriptions and internal policies as the primary cause for weaknesses in the charity’s management”.
That “confusion exacerbated tensions, which culminated in a dispute and multiple resignations of trustees and both founding patrons”.
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4:43
Why was Prince Harry accused of ‘bullying’?
Harry: Report falls troublingly short
A spokesperson for Prince Harry said it was “unsurprising” that the commission had announced “no findings of wrongdoing in relation to Sentebale’s co-founder and former patron, Prince Harry, Duke of Sussex”.
They added: “Despite all that, their report falls troublingly short in many regards, primarily the fact that the consequences of the current chair’s actions will not be borne by her, but by the children who rely on Sentebale’s support.”
They said the prince will “now focus on finding new ways to continue supporting the children of Lesotho and Botswana”.
Dr Chandauka said: “I appreciate the Charity Commission for its conclusions which confirm the governance concerns I raised privately in February 2025.”
But she added: “The unexpected adverse media campaign that was launched by those who resigned on 24 March 2025 has caused incalculable damage and offers a glimpse of the unacceptable behaviours displayed in private.”
All police forces investigating grooming gangs in England and Wales will be given access to new AI tools to help speed up their investigations.
The artificial intelligence tools are already thought to have saved officers in 13 forces more than £20m and 16,000 hours of investigation time.
The apps can translate large amounts of text in foreign languages from mobile phones seized by police, and analyse a mass of digital data to find patterns and relationships between suspects.
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2:00
Grooming gang inquiry: ‘Our chance for justice’
‘We must punish perpetrators’
The rollout is part of a £426,000 boost for the Tackling Organised Exploitation (TOEX) programme, which supports officers to investigate complex cases involving modern slavery, county lines and child sex abuse.
“The sexual exploitation of children by grooming gangs is one of the most horrific crimes, and we must punish perpetrators, provide justice for victims and survivors, and protect today’s children from harm,” said safeguarding minister Jess Phillips.
“Baroness Casey flagged the need to upgrade police information systems to improve investigations and safeguard children at risk. Today we are investing in these critical tools.”
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1:36
Key takeaways from the Casey review
Lack of ethnicity data ‘a major failing’
Police forces have also been instructed by the home secretary to collect ethnicity data, as recommended by Baroness Casey.
Her June report found the lack of data showing sex offenders’ ethnicity and nationality in grooming gangs was “a major failing over the last decade or more”.
She found that officials avoided the issue of ethnicity for fear of being called racist, but there were enough convictions of Asian men “to have warranted closer examination”.
The government has launched a national inquiry into the abuse and further details are expected to be announced in the coming weeks.