At St Mary's primary school in London, almost half of children are entitled to a free school lunch owing to the fact they are from England's poorest families.

And while charities argue that more pupils should be allowed access to taxpayer-funded meals amid a cost-of-living crisis caused by sky-high inflation, the government of Prime Minister Rishi Sunak is resisting such calls.

At 48 percent of pupils, the proportion of St Mary's children entitled to a free school lunch is far higher than the UK average.

"It's shocking to think that a number of children and our families are struggling to make ends meet and are struggling to provide the food that they need for their families," Claire Mitchell, part of the school's leadership team, told AFP.

Other families who ought to benefit from free school meals cannot because they earn above the cut-off point, which stands at £7,400 ($9,163) per year in England.

"The threshold is just set too low, and is out of step with the other devolved nations in the UK," according to Stephanie Slater, founder and chief executive of charity School Food Matters.

"In Northern Ireland, the threshold is £14,000 pounds. In Scotland and Wales they are just beginning to roll out universal free school meals, meaning that every child in every school will eventually get a free meal at lunchtime."

By comparison, just over one-third of pupils in England benefit from the assistance worth about £2.40 a day. And according to the Child Poverty Action Group, one in three children in England which it says live in poverty do not qualify.

'Started with pandemic'

At St Mary's, a Roman Catholic school, many parents are struggling to cope with spiralling energy and food bills. The school has its own food bank offering donated staple items like bread and milk for free.

"The pandemic is for us where we really started noticing the change when families were either losing jobs or unable to access as many hours at work as they were previously," said Mitchell.

According to the Sutton Trust, the number of families unable to afford school meals in England has jumped by 50 percent during the inflation surge. The charity has meanwhile hit out at the government for not widening access in a recent budget.

England and Manchester United footballer Marcus Rashford, who benefitted from free school lunches, has led a campaign for greater availability. He has been joined by the likes of singer Zayn Malik, London mayor Sadiq Khan and Ken Murphy, chief executive of British supermarket giant Tesco.

"When we talk about hunger, we're talking about children coming to school and relying on a hot, nutritious meal at lunchtime," said Slater. For those not entitled to a free lunch but who find themselves in difficulty, "schools will either subsidise free meals for those children out of their own school budgets, or families are sending in packed lunches that are inadequate because they're struggling to find good nutrition", she told AFP.

For Mitchell, a hungry child "will struggle to focus and concentrate". "If they're not reaching their full potential now... it'll be harder to catch up." — AFP