There has been an even greater rise in the cost of diesel this winter, which is the result of two main factors. Firstly, bad weather and the ongoing ban on Russian oil, have impacted European refiners who are producing less gas oil/diesel, causing supply constraints. Secondly, geopolitical and logistics disruptions, such as attacks on refining infrastructure and shipping routes (in particular around the Black Sea and Red Sea) have increased costs for transporting and refining oil too.