So what should a worried citizen stockpile in case the shelves become bare?
Will there be shortages if there is a no deal Brexit?
There will if Britain leaves the EU without a deal, a lobby group representing Sainsbury's, Asda, McDonald's, KFC and other firms believe.
Problems would be particularly acute around March, when Britain is scheduled to quit the bloc, and when most of its produce from lettuces to tomatoes is out of season, with a higher percentage imported, the British Retail Consortium (BRC) added.
The statement, also signed by the bosses of the Co-operative , Marks & Spencer, Lidl and Waitrose supermarkets, was published before key Brexit votes in Parliament set for Tuesday January 28.
Responding to the BRC's letter, a spokesman for Prime Minister Theresa May said plans were in place to keep customs working and traffic flowing in the event of a hard Brexit.
Food security was high and that would "continue to be the case whether we leave the EU with or without a deal, he said.
What should we stockpile in case of a No Deal Breixt?
In terms of stockpiling it has to be remembered that meat and vegetables cannot be stockpiled unless they are frozen.
Manufacturer Emergency Food Storage is selling so-called Brexit Boxes for £295.
Inside the package, which has a shelf life of 25 years, there are 60 freeze dried meals, 48 portions of meat, a water filter and fire starting gel.
Some of the meals included in the Brexit Box are beef and potato stew, chicken tikka and pasta bolognese.
Emergency Food Storage UK also sell a deluxe Brexit box, which includes puddings and breakfasts.
What is the official advice?
A government spokesperson said: "People don't need to stockpile food, water filters or fire starters.
"The UK has a strong level of food security built upon a diverse range of sources including strong domestic production and imports from third countries. This will continue to be the case whether we leave the EU with or without a deal."
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