A farmer with six hundred tonnes of potatoes he can't sell is blaming changing consumer tastes. GB Potatoes says this year is a “tough market” for growers, as a bumper crop this year has caused an oversupply.

This week we're looking at the history of farming and what that tells us about what drives change in farming and food.

One of the biggest seed and chemical crop protection companies in the world is expanding their operation in the UK.

Presented by Charlotte Smith and produced by Beatrice Fenton