It seems soooo stupid. As has already been said, it's a deprived area, how the foc do they afford fags at £10 a pop?
Also, how do they police it?? It would be like the stoning scene in Monty Python...... "Are there any smokers here?" " no, no, no, no cough cough cough". Seriously though, they would ask "have you given up the fags?" "yes" would be the reply.... gets vouchers, walks out of sight and sparks up.... job done!