Quit attempts increased in the three months leading up to Scotland's smoke-free legislation, resulting in a fall in smoking prevalence. However, neither has been sustained suggesting the need for additional tobacco control measures and ongoing support.This sounds like a call for 'reward for failure', which we seem to see too much of these days. We're not succeeding in bringing down smoking rates, so we need to up the budget and try even harder. (More comment here.)
Of course I have not studied her subject in detail, but I don't believe she is the first to point out that the long decline in smoking rates has flattened out in recent years. I don't know her methods either but she does seem quite thorough:
Our study has a number of strengths. We used a robust and flexible modelling approach. We had Scotland-wide data from all prescribing sources, including prescriptions issued in Scotland but dispensed elsewhere. We had data over a seven year period, including three years following the legislation, reducing the risk of random variation due to short follow-up. We also had nationally representative quarterly data on smoking prevalence.