M&S stores in France have started running out of food as 'convoluted' Brexit rules were blamed for millions of pounds worth of meat exports from Britain being left to rot in Rotterdam and Calais.
Shelves in the upmarket supermarket's food halls in Paris and Lille are bare as it becomes the latest company affected by Brexit border delays - with lorries trying to cross the Channel being held up for days.
Images shared on Twitter showed the frustrating situation, with no clear indication of when supplies will be restocked and one shopper claiming the problems have already lasted three weeks.
An M&S spokesman confirmed the lack of groceries was a result of 'Brexit teething problems' disrupting supply chains. Sandwiches, biscuits and ready meals such as curries seem to have been among the products affected.
The grim scenes emerged as British butchers complained shipments were suffering from tight customs rules, echoing complaints from the fishing industry that seafood is being left to rot at UK docks.
One exporter told The Times that there are five containers of fresh pork held in the Dutch port of Rotterdam for a fortnight after a problem with a veterinary certificate being filled in incorrectly.
And in Calais another five containers, believed to contain 23 tonnes of chicken worth at least £500,000 have been stopped because of red tape. Most of the meat will have to be incinerated because of strict rules about white meat being processed within eight days of slaughter.
Nick Allen, chief executive of the British Meat Processors Association, said: 'The new post-Brexit customs system for meat products is convoluted, archaic and badly implemented.
'If continental supermarkets are unable to have products delivered the way they need them to be, this trade will simply be lost as EU customers abandon UK suppliers and source product from European processors'.
Shoppers have complained of empty shelves in UK supermarkets with alcohol and staples including broccoli, tomatoes and cheese all missing as new Brexit rules hampered lorry drivers bringing in food from the EU and left truckers stranded at Dover for three days or more.
Cauliflower packs, citrus fruit, aubergines, courgettes, mushrooms, strawberries, raspberries, melons and blueberries as well as products like French wine, Champagne, Cognac and brie and Italian olive oil and mozzarella have been unavailable at major supermarkets such as Tesco, Sainsbury's, Asda and online giant Ocado.
Frozen food is also low at some stores including cod and prawns from Iceland and Norway.