Daily Express Today , Food prices going up 15percent , yes 15 percent of nothing is not a lot , they don’t know how cheap.... food has been. Farmers have not been paid according to inflation like most industries.Have heard of farmers selling potatoes for £50 - £100 per tonne after investing the money from probably 18 months ago, and having to pay soaring energy prices and soaring fuel prices , A LOT MORE THAN 15 percent.