The cost of your weekly shop is about to go up as the war in Iran squeezes the supply of synthetic fertiliser. So, what foods will be impacted and what can be done to bring prices

The cost of your weekly shop is about to go up as the war in Iran squeezes the supply of synthetic fertiliser. So, what foods will be impacted and what can be done to bring prices back down? @skynewsniall and @pkelso discuss on #ThisIsWhy.