The impact of the war in Ukraine is being felt throughout the food industry. The British Free Range Egg Producers Association says its' recent survey of members found 51% of those who answered, are considering coming out of egg production. They say supermarkets need to charge 40p more per dozen eggs, to reflect higher costs. Leaders in food policy are meeting to discuss the National Food Strategy; a White Paper which was due to be signed off but has been recently delayed because of the crisis in Ukraine. All this week on Farming Today, we're exploring growing under glass - from ornamental flowers to salad crops and trees. We hear how glasshouses are also a major resource in plant research, and are responsible for providing more than half a million plants every year for research into insect food, nutrition, plant growth and genetic techniques. Presented by Anna Hill and produced by Caitlin Hobbs