It’s “national no smoking day”, and stubbing out could help your wealth as well as your health. The 1.1 million Britons who quit a year ago have collectively saved more than 1 billion pounds by not feeding their nicotine habit, according to Yorkshire Bank. Meanwhile, the 13 million people who’ve carried on puffing since “no smoking day” last March have seen almost 12.5 billion pounds-worth of potential savings go up in smoke.