There are a growing number of people in Britain today who believe the century they're living in is making them sick. New director Anne-Claire Pilley travels around the country to meet some of them. In London, Sarah Dacre says she suffers such strong allergic responses to electrical appliances and mobile phones that she's moving out of the capital; in Somerset, Gillian McCarthy claims to have such extreme sensitivities to everything from household chemicals to electricity that she is allergic to her own hair.