The case for farming subsidies after Brexit | Letters

George Monbiot makes many good points (Farmers fear life outside the EU, but it could mean a rebirth for rural Britain, 11 January), including free markets’ impact on small farmers whose incomes fall in times of plenty. He could have said more on food security. Climate change, including gas escapes from frozen deposits, is a growing threat but pests, diseases, routine weather and even large volcanic eruptions (eg Tambora, 1815) can create havoc. So who is actually responsible for food