A no deal Brexit would be a 'disastrous' outcome for Britain's food sector -
And could disrupt some food supplies for weeks or months if delays at ports leave fresh produce rotting in lorries ...
The warning from Britain's Food and Drink Federation Wednesday.
The trade body - which includes the likes of Unilever and Nestle among its members - now urging the government to waive aspects of competition law, to allow suppliers and retailers to coordinate the delivery of food across the country.
It wants guarantees from the government that companies won't be fined by the regulator for engaging in anti-competitive behaviour.
Brexit supporters say there may be some short-term disruption from no-deal, but claim the UK will thrive outside the EU.
British foreign minister Dominic Raab is travelling in Canada, the United States and Mexico this week to seek to boost ties with non-European countries ahead of leaving the EU.
(SOUNDBITE) (English) BRITISH FOREIGN MINISTER DOMINIC RAAB SAYING:
"We hope to be good European neighbors, partners and friends in the future, but we do want to grasp those global opportunities and we want to expand our horizons and raise our level of ambitions in the world."
But retail giants like Tesco say leaving the EU on October 31 without a trade deal would be a huge problem.
Particularly as much of its fresh produce is imported, and warehouses are stocked full ahead of Christmas.
They warn fresh fruit and veg, which have a short shelf-life, can't be stored.
Customs checks at Britain's biggest port of Dover could also lead to delays.