Presented by Winifred Robinson. Is this the end of the cheap food era? Over the next few decades, the global food system will come under renewed pressure from population growth, shortages of water, labour and climate change. There is a real potential for demand to outstrip increases in global food production. Expectations of abundant and ever cheaper food could come under strain. The UK can no longer afford to take its food supply for granted. With guests: Alex Evans - Center on International Cooperation (CIC) Tom Hind - National Farmer's Union.