Farmers are clearing supermarket shelves of milk in protest at the low prices for their produce. The milk is then either paid for, or left at the checkout in trolleys.

Farmerss across the UK have been using Facebook to organise the 'Milk Trolley Challenge' with shops in Cornwall, Gloucestershire, Lancashire and Cheshire as well as Scotland being targeted.

Farmers say it costs between 30p and 32p to produce a litre of milk but they are are facing more price cuts. Arla has just announced a 0.8p litre cut taking the standard litre price to 23.01p for UK members of its cooperative.

Meurig Raymond, president of the NFU, said: "The market situation in dairy, lamb and many other products is driving farming families to a desperate state with returns from the market failing to cover costs of production.

"Given the current situation some farmers have been driven to take direct action; the NFU supports protests that have a proper target and a clear objective.

"However, we believe that the best way for farmers to get a fairer return would be for consumers to demand British food."