The idea
That establishments which provide air-conditioning ventilation to an approved minimum standard, should not be subject to the total ban which has been imposed. I am a non-smoker but I feel that this level of interference with millions of otherwise law-abiding citizens is unacceptable.
Why is it important?
Because it is an ongoing sore with smokers, and will most likely continue as such. Furthermore, if as I understand, the Houses of Parliament are exempt from this ban, it is even more reprehensible.