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Ministers have pitched ideas to tackle the cost of living, as record inflation pushes up food and energy prices.
Boris Johnson called for proposals from his team - that do not rely on spending taxpayers' money - during Tuesday's cabinet meeting.
The BBC has learned that the PM said he wanted to reduce childcare costs by easing health and safety rules.
And sources said Transport Secretary Grant Shapps suggested relaxing the frequency of MOTs.
Delays at the Passport Office were also raised, with Mr Johnson threatening to privatise the service if it did not start delivering better value for money.
Opposition parties have said the help on offer from the government to tackle rising living costs was insufficient, with Labour, the SNP and the Liberal Democrats calling for an emergency Budget to give more support to households.
Ministers are thought to be under pressure to act on the cost of living, with inflation at a 30-year high and household bills continuing to rise.
In a statement issued by No 10 on Monday night, the prime minister called for "a team effort across cabinet" to come up with ideas to "ease the burden on the British people and grow our economy".
One of the proposals came from the PM himself, with sources saying he wanted to lower the legal limits on adult supervision for children in England, as part of a drive to reduce living costs.
The issue has been raised a number of times at cabinet in recent weeks, and the Department for Education has been looking at how to relax the rules.
'Cutting corners'
Current legal requirements in England say there must be at least one member of staff for every three children in groups aged two years and under.
For two-year-olds and over, there must be one member of staff for every four children.
The Liberal Democrat and Conservative coalition government attempted to relax child-to-staff ratios in England as part of a package of reforms in 2013.
But the plans - spearheaded by then-education minister Liz Truss - were abandoned after they were opposed by Nick Clegg, who was deputy prime minister at the time.
Earlier this month, experts warned the government against relaxing nursery staffing rules as ministers reviewed ways to improve the cost, choice and availability of childcare.
Labour's shadow education secretary Bridget Phillipson said the proposal would "drive down quality whilst making no difference to availability".
And Lib Dem education spokesperson Munira Wilson said Mr Johnson has chosen to "cut corners and endanger our children", instead of addressing this issue "head on".
Another proposal presented to cabinet came from Mr Shapps, who suggested reducing the need for an annual MOT.
Every vehicle that is three-years-old or over must have a current MOT test certificate and drivers must renew this once a year, costing up to £54.85 for a car and £29.65 for a standard motorcycle.
But two cabinet sources told the BBC that Mr Shapps suggested reducing the need for renewal to every two years, rather than one, to cut costs for households.
No 10 said the PM wanted ministers to explore "innovative ways" to ease living costs - with proposals sent to the government's domestic and economic strategy committee for further discussion.
Downing Street said this committee would meet "in the coming weeks to finalise the proposals".
The prime minister's official spokesman said Chancellor Rishi Suank "underlined the importance" of not fuelling further inflation during the cabinet meeting, and that departmental budgets "are set" with no plans to currently go beyond these limits.
But Lib Dem leader Sir Ed Davey said the meeting showed the PM was "completely out of ideas during the most profound crisis in decades".
He added: "Whilst families are facing sky rocketing bills and soaring inflation, Boris Johnson's answer is another quiz night at No 10."
Sir Ed echoed Labour and the SNP's call for an emergency budget, including a cut in VAT, and backed opposition plans for a windfall tax on the profits of the oil and gas companies
Petrol prices
It comes as Labour has warned of a £10bn hike in annual petrol and diesel costs, with "soaring" prices putting the squeeze on household budgets.
"Labour's plan would help households through this crisis with up to £600 cut off energy bills, funded by a one-off windfall tax on the booming profits of oil and gas producers," said Labour's shadow secretary of state for transport, Louise Haigh.
The SNP called for an emergency budget earlier this month, saying the Tories had ignored the cost-of-living crisis.
The Green Party has also accused the government of failing voters on living costs, and campaigned for insulation projects to reduce energy needs and keep homes warm.