Case of the week

British entrepreneur James Dyson, inventor of the bagless vacuum cleaner, became embroiled in a filthy fight with competitors and was found guilty of "aggressive and untruthful" advertising by a French court. The court accused Dyson of exaggerating the benefits of baglessness and unfairly portraying his competitors. The court said Dyson used "abnormal" dust in TV adverts showing how conventional cleaners left behind pollen, germs, beetle excrement and animal fur.