The Bank of England has issued a stark warning that escalating conflict involving Iran could push UK inflation above 4%, as fears mount over the potential impact of Middle East tensions on global energy markets. The central bank's caution reflects growing anxiety within financial and policy circles that a broader regional war could send crude oil prices spiralling, with knock-on effects for households and businesses already grappling with the cost of living. Any sustained disruption to oil supplies from the Gulf region would be felt swiftly across the UK economy. Britain remains heavily reliant on imported oil and gas to meet its energy needs, despite years of investment in renewables and the broader push towards net zero. A spike in crude prices tends to filter through almost immediately to pump prices, and with a lag, to household energy bills, transport costs and the price of goods on supermarket shelves. For a Bank of England still working to bring inflation back down to its 2% target, a return to levels above 4% would represent a significant and unwelcome setback. The warning underscores just how exposed the UK remains to geopolitical shocks originating thousands of miles away. Iran sits astride the Strait of Hormuz, through which a substantial share of the world's seaborne oil passes, and any military escalation involving Tehran raises the spectre of supply disruption or even deliberate closure of the strait. Markets have historically responded to such tensions with sharp, sometimes short-lived, spikes in crude prices, but a protracted conflict could see prices remain elevated for months, compounding pressure on an already stretched Bank of England policymaking committee. For the UK's energy sector, the warning is a reminder of why the transition away from fossil fuels carries strategic as well as environmental weight. Every barrel of oil the country no longer needs to import is one less exposure to the kind of volatility now being flagged by the Bank. The push towards electric vehicles, renewable generation and battery storage is often framed purely in terms of emissions reduction, but episodes like this highlight the parallel case for energy security. A grid less dependent on imported hydrocarbons is inherently more insulated from the kind of shock a Middle East war could deliver. Consumers and businesses will now be watching closely to see how the situation develops. Should tensions ease, the inflationary threat may prove short-lived. But if conflict deepens, the Bank's warning suggests households could face a fresh squeeze on real incomes just as many were beginning to see some relief from the cost of living pressures of recent years. Either way, the episode reinforces the case for accelerating investment in domestic clean energy infrastructure, reducing the UK's vulnerability to price shocks rooted in instability far beyond its borders.