He also scrapped plans that would have made rental properties more energy efficient.
But with changes still years into the future – and the cost of living crisis rumbling on – will pushing deadlines back make a difference to people’s finances now? Here, Sky News takes a look.
When he was prime minister in 2020, Boris Johnson committed to banning the sale of any new petrol and diesel cars in the UK from 2030. This is now being pushed back until 2035.
Plans to fine manufacturers for each vehicle that doesn’t comply are also being watered down.
Figures show that although petrol and diesel are still the overwhelming majority – the numbers of plug-in and battery electric vehicles on UK roads have increased – by 45% and 58% respectively.
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And in 2023 more electric vehicles were registered than diesel ones for the first time.
This shows a “general trend” away internal combustion engines (ICE) – and towards more sustainable modes of transport already, says Oliver Montague, chief-executive and co-founder of the e-bike engineer company Swytch.
So a change in the timing of the ban is unlikely to have much of an impact.
“Those who have to transition [to EVs] will still have to do so – they just have more time to do it,” he tells Sky News.
“The real shift will be for people who can choose how they want to get around – who aren’t already hooked to one particular mode of transport” – such as a diesel car that needs trading in.
And with the average car journey being only around eight miles – he believes many will opt for e-bikes or cycling, instead of an electric vehicle, meaning the ICE ban will have even less of an impact.
The RAC also notes the ban only covers new petrol and diesel cars, which means “a lot of people won’t be affected as the majority tend to buy used vehicles”.
Mike Childs, head of science, research and policy at Friends of the Earth, adds that people will still be able to buy non-UK manufactured EVs.
“From a consumer perspective it won’t have a great impact because they can just buy Chinese or German EVs,” he tells Sky News.
“But for British manufacturing it’s a huge backwards step and a massive shot in the foot for jobs.”
No gas boilers in new homes
Plans to stop new build properties being fitted with gas boilers beyond 2025 are being pushed back 10 years.
This doesn’t affect people who already have gas boilers, who won’t need to replace them with alternatives such as heat pumps. As a result, this change is more likely to affect developers than consumers.
Jess Ralston, energy analyst at Energy and Climate Intelligence Unit, says that with a greater upfront cost for heat pumps, we won’t know until the changes come in how much of that will be passed on to buyers.
But she adds: “As time goes on heat pumps are going to be cheaper to buy and run anyway.”
Plans for all new heating systems to be low carbon by 2035, including £450m in household grants, has also been scrapped.
This means more people will have gas boilers for longer, which with prices “two to three times’ pre-crisis levels” will mean people paying more in energy bills, Ms Ralston adds.
But on Wednesday Mr Sunak did announce a 50% increase in the boiler upgrade scheme, which offers people £7,500 to help with the costs of switching from a boiler to a heat pump.
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Green Party hits out at Braverman
More energy efficient landlords
In 2020, Boris Johnson also pledged that from 2028 all rental properties would have to have an energy efficient rating of C or higher (A being the best and G the worst). But Mr Sunak is scrapping this due to “cost of living challenges”.
Ms Ralston says she “cannot get a single shred of logic” from the decision.
“This would reduce people’s energy bills in the cost of living crisis and increase energy security – things that the government say they want to be doing. It makes no sense whatsoever.”
Mr Childs says it will disproportionately affect people on lower incomes who are more likely to rent their homes.
“This is a massive kick in the teeth to people who live in cold, damp rented homes that are expensive to heat.
“It’s also a massive handout to landlords who can’t be bothered to insulate their properties properly,” he says.
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He adds that despite some drop in prices this year, the cost of oil and gas is increasing again – and will remain volatile for as long as Russia is at war with Ukraine.
“There are more renters than there are landlords, so it makes no sense on votes. It just begs the question of whether the government are being lobbied by wealthy landlords,” Ms Ralston says.
Hydrogen levy
The government was proposing to introduce a levy of around £100 on household energy bills in 2025 – to help pay for low-carbon hydrogen production.
But after many claimed the hydrogen was being used primarily in industry – not people’s homes – ministers have scrapped it.
This is being welcomed by environmental and consumer groups.
Ms Ralston says that heat pumps are far more efficient than hydrogen for heating homes – so the government was right to recognise this wasn’t something the public should pay for.
Mr Childs adds that hydrogen still relies on natural gas – which both homes and transport have been moving away from, so Friends of the Earth has been “against it from the outset”.
A £20,000 reward is being offered for information that leads to the identification of the parents of three siblings found abandoned in London over eight years.
The Metropolitan Police said that despite more than 450 hours of CCTV being reviewed, the parents of the three children, known as Elsa, Roman and Harry, remain unidentified.
However, it is believed their mother has lived in an area of east London “over the past six years”.
Elsa was believed to be less than an hour old when she was found by a dog walker on 18 January last year, in East Ham, east London.
In the months that followed it was found that she had two siblings who were also abandoned in similar circumstances, in the same area of London, in 2017 and 2019.
On Saturday, police said the independent group Crimestoppers had offered a £20,000 reward for information passed to the charity, which will expire on 18 April.
Detective Inspector Jamie Humm, of the Met’s child abuse investigation team, said: “We have carried out extensive inquiries over the past year to try and locate Elsa’s parents.
“This has involved reviewing over 450 hours of CCTV and completing a full DNA structure of the mother.
“We have serious concerns for the wellbeing of the parents, especially the mother, and are continuing to work closely with Newham Council and appeal for the public’s help for information.
“I believe that someone in the area will have been aware of the mother’s pregnancies and that within the community there may be (or) have been concerns for this mother’s welfare.
“Thanks to the DNA work of forensic colleagues, police will be able to eliminate any unconnected person quickly and easily, as such I would ask you to contact police with confidence.”
Elsa was found wrapped in a towel in a reusable shopping bag, of which police have also released a new image, and was kept warm by the dog walker. She was uninjured.
Police said at the time that it was “highly likely” that she was born after a “concealed pregnancy”.
The BBC reported that at an initial court hearing, East London Family Court was told it took doctors three hours to record Elsa’s temperature because of the cold, and the Met Office said that temperatures dropped to as low as -4C on the night she was found.
Hospital staff named her Elsa in a reference to the character from the film Frozen.
The police investigation into the identity of the children’s parents continues, and anyone with information is asked to call police on 101 or post @MetCC ref Operation Wolcott.
People can also contact Crimestoppers anonymously at any time on 0800 555 111 or via Crimestoppers-uk.org.
Fresh appeals have been made for information on what would have been the 20th birthday of Ellis Cox, who was shot dead in Liverpool last June.
A number of people have been arrested in connection with the murder at Liver Industrial Estate, but no one has been charged yet.
The 19-year-old’s family and police have paid tribute to him and called for those with information to come forward.
He was shot in the back after a confrontation between his friends and another group of up to three males on Sunday 23 June.
His mother Carolyn paid tribute in an appeal to coincide with what would have been his 20th birthday.
“He was so kind… so laid back, so calm, so mature for his age. And he was just funny. Very funny.
“He was my baby… no mum should have to bury a child. He was my life. And I don’t know what to do without him.”
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Meanwhile, his aunt Julie O’Toole said he was “the sort of person I think you’d be hard pressed to find anyone to say anything negative about. He was loyal, fiercely loyal… everything was about his family”.
To pay tribute to Ellis, Liverpool City Council will be lighting up the Cunard Building and Liverpool Town Hall in orange on Saturday.
Detective Chief Inspector Steve McGrath, the senior investigating officer, spoke about the information gathered so far, six months on from Mr Cox’s murder.
“I’m satisfied that the group that he was with was probably the target… and I would say that’s got something in relation to do with localised drug dealing in that area. But Ellis had no involvement in that whatsoever,” he said.
He added that police are looking for “really significant pieces of evidence now”, including “trying to recover the firearm that was used in relation to this, looking to recover the bikes that were used by the offenders”.
Former Manchester United and Scotland footballer Denis Law has died, at the age of 84.
In a statement, his family said: “It is with a heavy heart that we tell you our father Denis Law has sadly passed away. He fought a tough battle, but finally, he is now at peace.
“We would like to thank everyone who contributed to his wellbeing and care, past and much more recently.
“We know how much people supported and loved him and that love was always appreciated and made the difference.”
The Aberdeen-born footballer previously announced in August 2021 that he had been diagnosed with dementia.
A prolific striker, Law scored 237 goals in 404 appearances for Manchester United, for whom he signed for a then-British record transfer fee in 1962.
He is the only man to have two statues dedicated to him at Old Trafford – one on the Stretford End concourse, the other as part of the United Trinity statue overlooking the stadium’s forecourt beside fellow great George Best and Sir Bobby Charlton.
The only Scottish player to have won the Ballon d’Or award, in 1964, he was also part of United’s triumphant campaign in the 1968 European Cup – in which they became the first English club to ever win the competition.
In a statement, the club said: “Everyone at Manchester United is mourning the loss of Denis Law, the King of the Stretford End, who has passed away, aged 84.
“He will always be celebrated as one of the club’s greatest and most beloved players.
“The ultimate goalscorer, his flair, spirit and love for the game made him the hero of a generation. Our deepest condolences go out to Denis’s family and many friends. His memory will live on forever more.”
Wayne Rooney, former United captain and the club’s all-time record goalscorer, described Law as a “legend”.
“Thoughts with all Denis’s family and friends,” he said in an online post.
Another former United captain, Gary Neville, said: “A great footballer and a great man. It’s a privilege and an honour to have spent time in your company. The King of the Stretford End.”
A tribute from the Scotland national team said Law was “a true great”.
“We will not see his likes again,” it said.
Law also played for Huddersfield Town, Manchester City, and Italian club Torino during his club career, and made 55 appearances for Scotland, scoring 30 goals for his country.
Manchester City said in a post on X: “The whole of Manchester, including everyone at City, is mourning with you. Rest in peace, Denis.”