The Child Poverty Action Group said research conducted in 2008 had suggested less than 7% of those on benefits were problem drug users.

BBC: Children playing by boarded-up houses

Martin Dockrell, director of research and policy at the campaign group Action on Smoking and Health (Ash), acknowledges that there is no clear evidence of a significant harm to health from second-hand outdoor tobacco smoke.

BBC: New York's outdoor smoking ban: Will the world follow?

The group is doing their research and beginning to take action.

FORBES: How Do You Take Down the BCS?