By John Stevens Disposable vapes will be completely banned in a dramatic bid to stop youngsters becoming hooked. New rules, which are set to come into force next year, will herald the end of throwaway Lost Marys and Elf Bars. Ministers will also get new powers to restrict vape flavours, introduce plain packaging and change how vapes are displayed in shops so they don’t appeal to children. The Government argues the changes are needed to protect kids as figures show one in five has now tried vaping despite it being illegal for under-18s. E-cigarettes can be helpful for smokers wanting to quit, b…