The codes will be hidden inside the wrappers of any one of ten of Cadbury's leading chocolate bars including Crunchie, Time Out, Dairy Milk, Caramel, Boost, Wispa, Giant Buttons, Whole Nut, Fruit and Nut and Double Decker.

BBC: Eat yourself a win

Fruit and nut trees are the upper level, while below are berry shrubs, edible perennials and annuals.

FORBES: Written by Matt Hickman

It specializes in so-called nonrow agricultural chemicals--herbicides and pesticides for fruit and nut trees instead of crops like corn grown in rows.

FORBES: Chemical Balance