totally agree we have no idea how much sugar is in most products. I really like the idea of showing t-spoons on the side of tins and cans. It won't be easy but it can and should be done
I think you are slightly missing the point, if you tax the product the producer of that product will reduce the sugar and make more drinks available with less sugar. Its not just about getting 20p off some little kid off a council estate
the thing is that you don't know how much sugar is in drinks and food. 14 teaspoons in a large carton of ribena and you are only meant to have about 7 in a day