I’ve been warning about the spike in diesel prices, followed by shortages of supply, for several weeks now. Especially if Trump goes along with an export ban. A third of the diesel we import is from America, which is the world’s biggest diesel exporter (1.5m b/d). There are no alternative sources of supply. A US export ban would throw us into recession by Christmas. The economy, from farm machinery to road haulage, is powered by diesel.