In the UK, 0.7% of GDP comes directly from agriculture. Money may not grow on trees but a thriving industry sprouts from farming, Environment Secretary Elizabeth Truss says. One that brings in £100 billion a year to the economy and employs one in eight people. Farmers' salaries are paid, in large part, by the EU. The UK gets an average of 4 billion euros a year in direct payments and grants given for rural development. Overall, something like 55% of the UK's farming income comes from the EU's Common Agricultural Policy or CAP.

In the 1980s, the excess of this policy led to beef and butter mountains. This drove up Britain's budget contributions to the EU. That was until Margaret Thatcher won a rebate. She got Brussels to agree to give some of its money back. Today, for an annual British contribution of 23 billion euros, almost 10 billion is returned.

But the question remains: are farmers better off with the EU's support or would London back them better? We report from the UK.

Presented by Eve Irvine

Produced by Isabelle Romero & Mathilde Bénézet