There is no risk-free level of exposure to secondhand smoke. Secondhand smoke contains over 4,000 chemicals in the form of particles and gases - some of these chemicals are dangerous poisons. Secondhand smoke is bad for health - it is known to cause cancer as well as many other serious health problems. Just thirty minutes exposure is enough to reduce coronary blood flow.
Virtually all enclosed and substantially enclosed public places and workplaces are smoke free.
If you don't comply with the smoke free law, you will be committing a criminal offence. The fixed penalty notices and maximum fine for each offence are: