This report is from this week's CNBC's UK Exchange newsletter. Like what you see? You can subscribe here. If Britain should have learned one lesson from the pandemic and Russia's subsequent invasion of Ukraine, it is the importance of security of supply, whether in food, energy, fertiliser or other commodities. The Middle East crisis suggests it was not . Poor supply chain resilience may soon lead to shortages in refined oil products and, in particular, diesel and jet fuel (kerosene) . This is