An extra £100 million is being invested by Imperial Brands in its vaping business as demand for cigarettes declines.

Imperial Brands, formerly called Imperial Tobacco, is more than doubling its investment in Blu, its e-cigarette brand, this year as it steps up marketing and tries to get tobacco smokers to convert. The FTSE 100 group is one of the world’s biggest tobacco companies whose brands include Davidoff, Winston and Gauloises. [...]