British dairy farmers are protesting because they are say they're not being paid a fair price for milk by some supermarkets, which have made cuts of up to 2p a litre. Farmers fear the shortfall could force them out of business.
The National Farmers Union (NFU) is focusing on Morrisons, Asda and the Co-operative because they say that, as of August 1, their milk prices will not cover farmers' production costs of about 30p a litre.
According to the NFU, Tesco, Sainsbury's, Waitrose and Marks & Spencer have a pool of farmers who provide them with milk, and the way they are paid makes sure all production costs are covered.
The focus has largely been on the big supermarkets, but the British Retail Consortium says the stores are the best payers for milk and that other big buyers, including manufacturers and the public sector, need to show more support for farmers. The NFU agreed that processors have a responsibility to pay dairy farmers a fair price.
The NFU is advising people to shop at places where farmers are paid a "sustainable" price that pays for the cost of production.