The 50-year-old, who denied charges of manslaughter and murder, gave different accounts of what happened in the seconds before he plunged a kitchen knife 11cm into her chest.
Scarlett’s mother, Sarah Hall, was the only other person in the room, and stood by her partner, previously telling Teesside Crown Court that Vickers would never have harmed her.
During sentencing, Nicholas Lumley KC, defending, said: “Sarah Hall remains resolute in her belief that the father of her only child did not intend Scarlett any harm and his parents are of the same view.”
Ms Hall did not see the knife sticking in her daughter, Mr Justice Cotter said, because Vickers immediately removed it and put it on the side in the kitchen.
The jury, by a majority of 10-2, convicted him of murder after 13 hours of deliberations, rather than the less serious alternative of manslaughter, or to clear him.
Ms Hall and other family members in the public gallery looked stunned when the verdict was delivered.
Vickers himself did not react in the dock.
His sentence is the lowest minimum term the judge can pass down for a murder verdict.
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1:04
Killer dad told police: ‘We were mucking about’
During the trial, Vickers insisted his daughter’s death had been a “freak accident”.
He claimed he had swiped what he thought were tongs along a work surface, into her chest, and never realised it was a knife.
The judge described his version of events as “unconvincing and wholly implausible”.
Prosecutor Mark McKone KC had told jurors that Scarlett’s death was not an accident.
Home Office pathologist Dr Jennifer Bolton explained to the jury that how the knife went into Scarlett’s chest meant it must have been held in a hand, with force.
Smoked cannabis and drank wine
During the sentencing, Mr Justice Cotter said Vickers had “smoked cannabis and drank some wine” after work.
Ms Hall was cooking spaghetti bolognese when Scarlett came down from her bedroom, around 10.15pm, and they were said to have thrown grapes at each other for fun.
The mother said she then snipped at Vickers with the tongs and he complained it hurt – to which Scarlett called him “wimpy”.
Ms Hall claimed to turn away to serve the meal and then heard Scarlett say “ow”.
When she looked back, their only child was said to be pouring with blood.
In the 999 call, Ms Hall told the operator they had been “messing about” and her partner had thrown something at their daughter and “he didn’t realise”.
Vickers told one paramedic that his daughter had lunged towards him during a bout of play-fighting, the court was told.
“Exactly what then happens only you know,” the judge said, referring to the moment of the stabbing.
For the sentencing, the court heard the judge took into account the fact it was a momentary act, with no premeditation.
‘Loss of temper’
Mr Justice Cotter said: “Scarlett was just 14, a normal, healthy girl with a long life ahead of her when it was cut short by you.
“She died in the kitchen of her own home within minutes of having been stabbed.
“It went from an ordinary, happy family Friday night to tragedy within seconds due to what must have been your loss of temper.
“There is no other plausible explanation.”
He added: “You have never given a truthful explanation of what happened.”
Speaking outside court, Detective Superintendent Craig Rudd said: “We may never know precisely what happened in that kitchen, but we can be certain there is no justification for what Simon Vickers did.
“Had he not picked up that knife Scarlett would still be alive today.”
After a tricky few weeks for the government, in which backbenchers overturned plans to cut back welfare spending, now a heavy hand to get the party into line.
Three newly-elected MPs, Neil Duncan-Jordan, MP for Poole, Brian Leishman, MP for the new Alloa and Grangemouth constituency, and Chris Hinchcliff, for North East Herefordshire, have all had the whip suspended.
Rachael Maskell, MP for York Central, who was first elected a decade ago, is the fourth.
They will all sit as independent MPs and will not be allowed to stand for Labour at the next election, unless readmitted. All appear to be surprised – and upset.
Three more have lost plum roles as trade enjoys – Dr Rosena Allin-Khan, Bell Ribeiro-Addy and Mohammed Yasin, all on the left of the party.
All were active in the rebellion against the government’s welfare reforms, and voted against the changes even after a series of U-turns – but were among 47 Labour MPs who did so.
When MPs were told after the welfare vote that Number 10 was “fully committed to engaging with parliamentarians”, this was not what they were expecting.
We’re told the reasons for these particular suspensions go wider – over “persistent breaches of party discipline” – although most are not high profile.
In the scheme of things, Jeremy Corbyn and John McDonnell rebelled against the Labour whip hundreds of times under New Labour, without being suspended.
But these MPs’ pointed criticism of the Starmer strategy has clearly hit a nerve.
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7:02
Suspended MP: ‘There are lines I will not cross’
Maskell – who was referred to, jokingly, in the House of Commons earlier this month by Tory MP Danny Kruger as “the real prime minister” – led the rebellion against cuts to winter fuel allowance which triggered a U-turn which she said would still leave pensioners in fuel poverty.
There was an attack on the government’s values. Duncan-Jordan, a trade unionist who won the Poole seat by just 18 votes, led the welfare rebellion, telling Sky News the proposed cutbacks were “not a very Labour thing to do”.
Hinchliff, who has also opposed the government’s housebuilding strategy and plans to expand Luton airport,had told his local paper he was willing to lose the whip over welfare cuts if necessary. He also has a marginal seat, won by fewer than 2,000 votes.
Leishman, a former pro golfer, has also been vocal about government plans to close the refinery in his Grangemouth constituency after promising to try and make it viable. They are MPs who the leadership fear are going for broke – and that’s concerning as more tough decisions on spending are likely to come.
But after a poorly-handled welfare vote, in which MPs seemed to be in the driving seat forcing changes, will this instil a sense of discipline over the summer break?
While some MPs will see this as a deterrent to rebellion, for those whose chances of re-election are small, it may continue to be seen as a price worth paying.
To other Labour MPs, the move is confusing and may be counter-productive. One Labour MP on the left told me: “So, we’re suspending people for winning an argument with the government?”
Another, in the centre, feared it looked divisive, saying: “We need to go into the summer focused on the opposition – not involved in our melodramas.”
Number 10 wants to show rebelling comes at a price – but many Labour MPs with concerns about their political direction will want to know the prime minister is planning to listen to concerns before it gets to that point.
An Afghan interpreter who worked with the British military has told Sky News he feels “betrayed by the British government” after a massive data breach saw his personal details revealed.
Ali, whose name has been changed to protect his identity, had long suspected his details had been shared with the Taliban – but found out just yesterday that he was a victim of the breach three years ago.
He is now even more fearful for the lives of family members still in Afghanistan, who are already in hiding from the Taliban.
Ali worked alongside British soldiers in Helmand Province to help them speak with Afghan people. His job also involved listening in on Taliban radio communications and translating them for the British forces.
“The Taliban called us the British eyes,” he told Sky News. “Because they think if we are not on the ground with them, the British force cannot do anything.
“They know that you’re listening to their chatting and the British forces are acting according to our translation. We were always the first target and our job was always full of risk.”
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2:51
Here’s what the public couldn’t know until now.
After the Taliban seized power in Afghanistan in 2021, Ali – who had already suffered injuries after the Taliban targeted him with a car bomb – was brought to the UK through the British government’s Afghan Resettlement Programme (ARP) for his own protection.
Once in the UK, he began to suspect his data had been leaked after his father “died because the Taliban took him into custody and beat him”.
Ali contacted the Ministry of Defence to raise concerns over his personal information last year, and stated in an email that he was “terrified”, adding: “I beg of you, do not pass this information to anyone.”
“They just ignored what I told them and they never replied,” he said.
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1:59
Afghans being relocated after data breach
‘The Taliban want me’
Following confirmation that the data breach did take place, Ali is even more scared for the lives of his family members who have already been in hiding from the Taliban for around five months.
“I’m feeling terrible and frustrated,” he said. “My family’s details have been shared with the Taliban intelligence forces and now they are looking for them.
“Every day, every single minute, my family’s waiting for their death, because if anyone comes to knock the door, they think that that is the Taliban.”
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Ali has twice applied for his family to be relocated to the UK but both applications have been rejected. He is now renewing his call for the British government to move his loved ones.
“I have carried the body of the British soldier,” he said. “I feel betrayed by the British government. They should relocate my family to a safe place.”
Ali has decided he will return to his homeland to help his family if they are not granted legal passage to the UK.
“If we don’t win [the case], I have decided I want to go back to Afghanistan and finish this,” he said. “The Taliban want me. If the British government can’t save my family, then I have this one responsibility to go and save them.
“I don’t want my family being killed for something they didn’t do.”
Sky News has contacted the Ministry of Defence for comment.
Temperatures are set to hit 30C in some parts of the UK this week.
Highs of 28C can be expected on Thursday before temperatures are forecast to peak at 30C in London on Friday, Met Office meteorologist Jonathan Vautrey said.
Other areas in southeast England will push towards the high 20s on Friday, where the average temperature in July is around 23C.
“We’re starting to see south-westerly winds come in, that’s bringing in hotter and more humid conditions, particularly in southern areas, we are going to see temperatures climbing again,” Mr Vautrey said.
“Friday is looking to be the peak of the current hot spell. This heat is not going to be as widespread as what we’ve just come out of, areas to the north aren’t going to be seeing the same highs.”
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2:59
Much of England at risk of drought
But the weather is set to turn later in the week, with a chance of heavy rain and thunderstorms across the UK on the weekend, Mr Vautrey said.
Temperatures will start to slowly drop but are still expected to reach 28C or 29C on Saturday and 25C on Sunday.
A yellow thunderstorm warning has been issued for much of Northern Ireland from 11am until 8pm on Thursday, and this unsettled weather is forecast to spread across more of the UK.
Heavy showers and a few thunderstorms may cause some disruption, particularly to travel, with between 30mm and 40mm of rainfall over a few hours in Northern Ireland, the Met Office said.
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0:46
Is this the UK’s hottest year?
Meanwhile, Southern Water has become the latest company to bring in a hosepipe ban as England battles exceptionally dry weather.
Restrictions like watering gardens, filling paddling pools or washing cars would come in for households in Hampshire and the Isle of Wight from Monday, the company said.
It has been the driest start to the year since 1976 for England, causing many water companies to bring in hosepipe bans.
Rainfall across England was 20% less than the long-term average for June, the Environment Agency said. This June was the hottest on record for the country.