WEALTH August 13, 2026 0 Comments

How the Iran Conflict Could Unleash a Financial Storm That Bury the UK Economy—Here’s What Every Investor Must Know Now

So here we are again, staring down the barrel of a potential UK economic meltdown—and no, it’s not just the relentless heatwaves wilting our high streets or the drought dragging down our harvests. This time, it’s a geopolitical powder keg brewed up by none other than Donald Trump’s ongoing war on Iran that’s threatening to choke off the Strait of Hormuz, the vital artery for a fifth of the world’s oil and gas. Treasury officials are sounding the alarm: if this standoff drags on, Britain could see growth fizzle to a mere 0.3% in 2027, the slowest pace since the cost-of-living crisis back in ’23. Imagine watching your finances getting squeezed as inflation threatens to spike past 4%, while tax hikes loom and spending plans dare to get lavish. It’s a perfect storm making Prime Minister Andy Burnham’s budget challenges look like a walk in the park. Curious what this means for your wallet, investments, and the future of UK business? Let’s unpack this tangled mess together. LEARN MORE.

Andy Burnham has been warned that the UK economy will grind to a halt if Donald Trump presses on with his war on Iran – just as repeated heatwaves hit output, writes Hugo Duncan.

Treasury officials predict growth will slow to 0.3pc in 2027 if the Strait of Hormuz remains effectively closed for the rest of this year due to the conflict.

That would be the worst performance since 2023, when Britain was in the grip of a cost-of-living shock following Russia’s invasion of Ukraine, and well below the 1.6pc expansion that has been forecast by the Office for Budget Responsibility.

The internal forecast also warns inflation in the UK could rise from 2.6pc to 4.3pc in the first quarter of 2027, hitting living standards.

The Treasury briefing, reported by Bloomberg, came as Iran and the US remain at loggerheads over a permanent end to the war in the Gulf.

And it represents a major headache for Burnham and his Chancellor John Healey ahead of a Budget in October that analysts warn could see £25bn of tax hikes to fund lavish spending plans.

Any slowdown – such as the one outlined by Treasury officials – would blow a fresh hole in public finances as tax receipts fall and welfare payments rise.

And surging inflation would undermine the Government’s efforts to help households with the cost of living.

Official figures today are expected to show growth slowed in the second quarter of the year, following an expansion of 0.6pc in the first three months.

It is feared the economy ground to a halt in June, with no growth, raising the prospect of a painful bout of ‘stagflation’ and further undermining the claims of ex-Chancellor Rachel Reeves to have left Britain on a firm footing.

Burnham and Healey have also been warned that heatwaves are taking a toll as productivity tumbles, high street sales wilt, and drought damages harvests and threatens food shortages.

Martin Beck, an economist at WPI Strategy, estimated the hot weather has cost the UK economy around £3bn, while green think-tank Verdant put the figure at £4.4bn.

The oil price remained close to $90 a barrel last night amid disruption to shipping through the Strait of Hormuz, through which a fifth of global oil and gas supplies passed before the war.

And the International Energy Agency yesterday warned global stockpiles of oil were ‘rapidly depleting’ due to the conflict.