A ban on tobacco promotion comes into force today in a bid to cut down on the numbers of smokers and deter young people from taking up the habit. From midnight supermarkets across England were forced to hide cigarettes under the counter or behind shutters. The Department of Health said the move was in response to evidence that cigarette displays in shops can encourage young people to take up the habit. More than 300,000 children under 16 try smoking each year and 5 per cent of children aged 11 to 15 are regular smokers, according to its figures.                 –DM