@Paulos_the_fog The Guardian tells that one reason would be Brexit. "Some importers say Brexit is also a factor, as the increased costs and paperwork involved in shipping to the UK have put it at the back of the queue for products in short supply." https://www.theguardian.com/business/2023/feb/22/aldi-asda-morrisons-supermarkets-rationing-salad-ingredients
Sounds reasonable to me...