Many of the pesticides they use here are so harmful that they are banned in UK. Yet they are used by most of India's four million cotton farmers. B A Hepsibah leads the shell-shocked threesome back to the village to show them the physical realities of how these pesticides have affected people here. They see youngsters who have been blinded and crippled as a result of the chemicals.

Martha, Robin and Diko are clearly upset by what they see and learn. "It's terrible to think that the clothes we buy back home could be responsible for harming people in that way," says Martha. "It makes us more determined than ever to make a difference."