Between 30% and 50% or 1.2-2bn tonnes of food produced around the world never makes it on to a plate.

As much as half of all the food produced in the world – equivalent to 2bn tonnes – ends up as waste every year, engineers warned in a report published on Thursday.

The UK's Institution of Mechanical Engineers (IMechE) blames the "staggering" new figures in its analysis on unnecessarily strict sell-by dates, buy-one-get-one free and Western consumer demand for cosmetically perfect food, along with ...