Coca-Cola and other drink makers are poised to sue the government over George Osborne’s new sugar tax. Industry bosses are drawing up plans for a legal challenge after the chancellor announced a charge on sugary drinks such as Coke, Red Bull and Irn-Bru. The tax will be levied from 2018. The proposal puts Osborne on a collision course with some of the world’s most powerful companies, and adds to the disarray engulfing the government in the aftermath of the budget.