Sugary Drinks Tax

I support a sugar tax. In Mexico, the average person has half a litre of Coke every day. Did the hon. Lady consider the possibility of a tax on sugar as an input into other products? After all, if I was making Hobnobs and the tax was at 10%, and 50% of a Hobnob was sugar, I would only have to make a slight change to the price, the formulation, or the number of biscuits. Would it not be better instead to have a tax on all sugar inputs, to give the right incentives to both consumers and producers?