The latest escalation between Israel and Iran is not merely a regional concern. For those watching the gilt markets and the Bank of England’s inflation trajectory, it is a direct input into the cost of living crisis. The UK Treasury, in a sobering assessment, has warned that a sustained spike in crude prices could add a full percentage point to inflation by the end of the year. This is not hyperbole. Brent crude has already nudged above $92 a barrel, and if the Strait of Hormuz becomes a chokepoint, we are looking at a repeat of the 1973 oil shock, albeit in a world already groaning under the weight of elevated prices.
Let’s be clear about what this means for fiscal policy. The Chancellor’s headroom, already eroded by sticky services inflation and a labour market that refuses to soften, will be further squeezed. Every dollar increase in oil costs ripples through petrol prices, heating bills, and ultimately into core CPI. The market is pricing in a higher peak for base rates, and the yield on the 10-year gilt has already crept up 15 basis points this week. This is the cost of geopolitical risk, and it is being paid by British households.
Meanwhile, the conflict plays into Iran’s hands. Tehran knows that any disruption to global supply will strengthen its negotiating position, both on the nuclear file and in regional power dynamics. The IRGC’s ability to threaten tanker traffic is a lever that keeps oil markets on edge. European capitals, including London, are now forced to weigh moral support for Israel against the hard economics of energy security. The Treasury’s warning is a tacit admission that the UK’s own fiscal stability depends on the Strait of Hormuz remaining open.
Capital flight is another dimension. In times of Middle Eastern tension, investors flee to the dollar and gold. Sterling, already under pressure from sticky domestic inflation and a widening current account deficit, is taking another hit. The pound has slipped below $1.24 against the greenback, making imports more expensive and compounding the inflation problem. The Bank of England is caught in a nasty feedback loop: higher oil prices mean higher inflation, which means higher rates, which slows the economy but does little to curb energy-driven price rises.
Let me be blunt: the market’s patience with central bank credibility is thin. The BoE’s own forecasts have been repeatedly wrong. If oil remains elevated, the MPC will be forced to choose between tightening into a slowdown or watching inflation expectations become unanchored. Neither option is palatable. The Treasury’s warning is a canary in the coal mine, but the question is whether the government has any tools left to respond. Fiscal stimulus is out of the question with debt-to-GDP at post-war highs. Windfall taxes on oil giants are a political sop but do little to shield consumers from the pass-through.
The bottom line is this: the flare-up in the Gulf is not a sideshow. It is a direct threat to the UK’s inflation outlook, fiscal credibility, and currency stability. The market is already repricing risk. The question now is whether this is a temporary spike or the beginning of a prolonged period of higher energy costs. If history is any guide, these shocks tend to persist. Investors should brace for continued volatility in gilts, a weaker pound, and a central bank that is fast running out of room to manoeuvre.
