The standards are designed to make sure school children are fed healthy food.

Many councils say school meal costs will rise and funding for free school meals increase if there is no-deal.

The government said the food industry was “well versed at dealing with scenarios that can affect food supply.”

“We have a highly-resilient food supply chain and consumers in the UK have access to a range of sources of food. This will continue to be the case when we leave the EU.”

Prime Minister Boris Johnson insisted earlier on Monday that no-deal Brexit preparations are on track.

Some councils are anticipating they will not meet nutrition standards because of a rise in food prices and restriction of choice anticipated after a no-deal Brexit, particularly on fresh imports from Europe.

For example, North Ayrshire Council says it “might need to amend school nutrition standards”, in its internal Brexit planning document.

Local councils are legally obliged to provide high standard food to vulnerable users of public services and to manage the food supply challenges of leaving the EU without a deal.

Other councils, such as North Tyneside, report that “special dietary requirements may be difficult to meet” and that “if fresh produce is difficult to come by” schools should “increase use of tins and frozen goods”.

Many councils say that prices for school meals will rise, and central government funding for free school meals will have to increase.
Some also mention the possible use of food banks. Slough has contacted food banks in its area to check contingency plans for food shortages, and some Scottish councils have already increased funding for extra provision from food banks.

Bedford Council’s planning document from its internal Brexit planning team says care homes are “advised to hold four to six weeks supply of non-perishable foodstuffs”.

Hastings Council’s internal Brexit risk document even goes as far as saying: “There might be the need for rationing. The severity would depend on what was available and particularly the duration of any shortages.”

Insiders suggest this is a reference to the prevention of stockpiling, more than a return to wartime ration books.

The documents seen by the BBC date from the end of last year – up until last month – but predate the appointment of Boris Johnson as prime minister.
Most take at face value the government’s national assessment for March that there will be no impact of a no-deal Brexit on overall food supply, but there could be an impact on price and choice.

An October no-deal Brexit would come, however, at a time when the UK is particularly dependent on European imports for its fresh food, and when there is little to no excess warehousing space, unlike in March.