When most people picture British farming, they probably imagine fields of wheat, potatoes or vegetables stretching across the countryside. But some of the food on supermarket shelves is produced in environments that look very different.
A tomato might spend its entire life inside a glasshouse, growing more than 20 metres tall with water and nutrients delivered directly to its roots. A lettuce could be grown inside a building, stacked on shelves under LED lights without ever seeing natural sunlight.
