Telegraph: Healthy schoolchildren were being kept indoors on Wednesday as government experts' conflicting messages about the dangers of smog led to widespread confusion.
The Department for Environment, Food and Rural Affairs warned of "very high' levels of pollution due to a mixture of dust from the Sahara and industrial emissions from Europe arriving on a south-easterly breeze.
But its own advisers at Public Health England admitted that the "vast majority of people' would feel no effects and independent...