An interesting proposal from the government to help Britons reduce fuel consumption and hence costs given the massive war-drive. price increases on it:

They have already begun contingency planning in case the conflict is protracted, including considering lowering speed limits to minimise fuel consumption

They’re not alone - the IEA has also suggested similar:

In the face of oil supply shortages caused by the closure of the strait of Hormuz, the International Energy Agency (IEA) suggested the world should use ovens less and cut back on car usage to increase resilience