U.S./Israel-Iran War: the Middle East On Edge
NextFin News - British homeowners are facing a fresh squeeze on borrowing costs, not because the Bank of England has moved, but because the market has decided it soon might. UK mortgage rates climbed to their highest level in around five months last week as inflation jumped to 3.1 per cent in the year to August, driven by soaring petrol and diesel prices, forcing lenders to reprice fixed-rate deals ahead of the central bank's September 17 decision.
The tension at the heart of this story is simple. The policy rate has sat at 3.75 per cent since December 2025, and all 65 economists in a poll this month expect it to stay there on Thursday. Yet the average two-year fixed mortgage has drifted to 4.49 per cent and the average five-year deal to 4.98 per cent, because fixed mortgages in Britain are priced off wholesale swap rates, not off Bank Rate directly. When traders decide a rate rise is more likely, borrowers pay more — before policymakers have even voted.
The inflation shock that reached the mortgage market first
The Office for National Statistics reported on Wednesday that consumer price inflation rose to 3.1 per cent in the year to August, up from 2.9 per cent in July and marking a five-month high. On a monthly basis, prices rose 0.5 per cent, compared with a 0.3 per cent rise in August 2025. Core inflation, which strips out volatile energy, food, alcohol and tobacco, held at 2.6 per cent, unchanged from July — a detail that matters, because it suggests the headline jump is being carried by energy rather than by broad domestic demand.
Transport prices, particularly motor fuels, made the largest upward contribution. Petrol rose 9.1 pence per litre between July and August, compared with a rise of just 0.3 pence per litre a year earlier, taking the average pump price to 161.3 pence. The RAC put average forecourt petrol at 170.54 pence a litre and diesel at 192.86 pence — diesel at its highest since 29 July 2022, petrol at levels not seen since 23 August 2022. Airfares added to the pressure, rising 6.2 per cent for the month.
"Sharp price rises for petrol and diesel pushed inflation up again in August," said Grant Fitzner, chief economist at the Office for National Statistics. "Higher airfares, particularly for long-haul journeys, also contributed to the increase."
The driver is external and visible: the breakdown of the US-Iran ceasefire in July sent oil and gas prices higher, with Brent crude approaching $100 a barrel. That same energy shock is due to hit household bills again from 1 October, when the energy regulator Ofgem is expected to lift the price cap by up to 4 per cent, adding roughly £50 to a typical annual bill.
Why mortgages move before the central bank does
Here is the mechanism that turns an oil-price spike into a higher monthly mortgage payment. British lenders do not price fixed-rate mortgages off Bank Rate. They price them off sterling interest-rate swaps — contracts that reflect what the market expects Bank Rate to be over the coming years. When inflation prints hot and traders bring forward their expectations of a rate rise, swap rates rise, lenders' funding costs rise, and fixed mortgage deals are repriced upward, often within days.
That is exactly what happened in March and April, when global uncertainty over the war in the Middle East pushed wholesale swap rates sharply higher and lenders raised the cost of fixed deals. It is happening again now. Swap rates rose sharply following the outbreak of the conflict as predictions of interest-rate cuts in 2026 gave way to forecasts of rate increases instead. Data from LSEG this week showed financial markets pricing a 30 per cent chance of a quarter-point rate hike on September 17, up from less than 10 per cent at the start of the previous week, and almost fully pricing in a November move.
The repricing is not uniform. While the average two-year fixed rate stood at 4.49 per cent this week, compared with 4.48 per cent a week earlier, the average five-year fixed rate slipped to 4.98 per cent from 4.99 per cent, according to data for 75 per cent loan-to-value mortgages. That small divergence is itself a signal: the market is more confident about the near-term path than the medium-term one, and competition among lenders for longer-dated business remains fierce.
The stakes are large because the refinancing wave is already under way. Close to one million five-year fixed mortgages are expected to come up for renewal in 2026, exposing homeowners who locked in ultra-low borrowing costs during the pandemic to sharply higher repayments. Data from L&C Mortgages showed that the average of the lowest remortgage five-year fixed rates across the 10 largest lenders stood at 3.89 per cent in January 2026 — well below today's averages, and a reminder of how much the funding landscape has shifted even before this week's moves.
Cyclical energy spike or the start of a structural shift?
The critical question for borrowers is whether this is a cyclical bump that will reverse, or the beginning of a structural shift to a higher-rate regime. The evidence points to a cyclical shock layered on top of a structural change in the interest-rate backdrop — and the distinction determines whether today's mortgage repricing is a temporary overreaction or a permanent step up.
The cyclical leg is clear. The inflation impulse is coming from oil, diesel and airfares — imported, volatile, and outside the central bank's direct control. Core inflation is flat at 2.6 per cent. Food and drink inflation held steady at 1.3 per cent despite warnings of energy-cost pass-through. "For the Bank, there are no flashing warning signs," said Gabriella Willis, UK economist at Santander CIB. Elizabeth Martins of HSBC put it more pointedly: "There is one more inflation and labour market release before the September decision, but as things stand now, we don't think conditions have been met for the holders to change their votes at this meeting."
History supports the cyclical read. Energy-driven inflation spikes since the pandemic have repeatedly peaked and faded without triggering a wage-price spiral, provided inflation expectations stay anchored. A poll of 65 economists expects inflation to average 3.1 per cent this year, fall to 2.5 per cent in 2027 and 1.9 per cent in 2028, with the median next policy move a quarter-point cut in the third quarter of 2027 — not a hike. Thomas Pugh, chief economist at RSM UK, sees inflation "peaking at almost 4 per cent in early 2027, before gradually dropping back to 2 per cent in 2028."
But the structural leg should not be dismissed. Bank Rate has been held at 3.75 per cent since December 2025 — a level that would have been unthinkable in the decade before the pandemic. Three of the nine Monetary Policy Committee members — Huw Pill, Megan Greene and Catherine Mann — already voted for an immediate rise to 4 per cent at the July meeting. Bank of England data showed a mortgage default rate of 6.2 per cent in the first quarter of 2026, the highest since the final quarter of 2024, when defaults hit 7.8 per cent in the wake of the Bank's 2023 rate hikes. That is the scar tissue of the last regime shift: households are still absorbing the move from near-zero rates, and they have less room to absorb another.
The structural risk is second-round effects. If energy costs feed into wage demands, and wage growth re-accelerates, a cyclical energy shock becomes embedded in domestic inflation — and the central bank would have to keep rates higher for longer to break it. That is the transmission the Monetary Policy Committee said it would watch for. "The renewed rise in energy prices means that the committee will be increasingly alert to the risk of these costs feeding through to persistently elevated inflation," said Martin Sartorius, lead economist at the CBI.
The second-order consequence the market is not pricing
The first-order effect of higher mortgage rates is obvious: higher monthly payments for new borrowers and those remortgaging. The second-order effect is what happens to the housing market and the broader economy when that squeeze lands on top of a weakening property backdrop.
Lloyds reported on Monday that the average UK house price fell annually in August, the first year-on-year decrease since November 2023. Higher mortgage rates reduce affordability, which reduces demand, which puts downward pressure on prices — and falling prices, in turn, weaken household balance sheets and consumer confidence. The Bank of England's own Monetary Policy Report in April estimated that about 53 per cent of UK mortgage holders would see their payments rise as existing deals roll over.
There is also a cross-market channel. A sharp rise in global bond yields tightens overall financial conditions, which is one reason policymakers may feel they can afford to wait. Higher yields raise the cost of government borrowing, which matters for a government already navigating a difficult fiscal position ahead of the autumn Budget. And it raises the discount rate applied to every long-duration asset, from equities to commercial property.
Yet there is a real gap between what swap markets are pricing and what most economists expect. Goldman Sachs, which had previously forecast that UK interest rates would remain unchanged throughout 2026, revised its view and now expects a 25-basis-point increase in November, citing higher inflation and continued economic growth — the economy recorded its fastest annual growth rate in 18 months in July. But James Moberly, senior UK economist at Goldman Sachs, still thinks the market has overshot: "Given this outlook, we continue to think that market pricing for Bank Rate... looks too high. We instead expect the MPC to hold this year before cutting in 2027."
If Moberly is right, today's mortgage repricing is a premature reaction to a rate rise that will not happen this year — a cyclical overreaction that will unwind once inflation peaks and the Bank holds. If he is wrong, and second-round effects take hold, borrowers locking in today will be relieved they did.
What would prove the dovish view wrong
The strongest counter-thesis is that the Bank of England is right to wait, that the inflation impulse is externally generated and temporary, and that moving too soon would damage an economy still growing at a modest 1.1 per cent this year. Nearly 90 per cent of economists in the poll expect rates to stay on hold for the rest of the year.
That view is defensible — but it rests on one condition: that core and services inflation do not re-accelerate. The falsifying signal is specific and observable. If core CPI or services inflation prints at or above 0.3-0.4 per cent month-on-month for two consecutive months, or if wage growth re-accelerates above the Bank's current expectations, the "no flashing warning signs" thesis breaks down. At that point the three hawkish MPC members would likely pick up a fourth vote, swap markets would price a near-certain November hike, and mortgage lenders would reprice again — this time with the central bank's backing.
Who benefits, who is exposed, and what to watch
In the short term, the exposed parties are clear: the nearly one million households whose five-year fixes mature in 2026, first-time buyers facing average two-year rates around 4.49 per cent, and any sector sensitive to consumer disposable income — retail, leisure, and housing-related industries. Savers, by contrast, may see better returns on deposits if rate-cut expectations continue to fade.
Over the medium term, the direction of travel depends on the inflation path. The base case, and the one most economists hold, is that inflation peaks near 3.3-4 per cent in late 2026 or early 2027 and then falls back toward the 2 per cent target, allowing the Bank to hold through 2026 and cut in 2027. In that scenario, today's mortgage repricing proves to be a cyclical overshoot, and rates stabilise rather than climb much further.
The downside case for borrowers is that oil stays near $100 a barrel, the Ofgem cap rise feeds into broader prices, and second-round effects appear in wage data. In that scenario, the Bank moves in November as Goldman Sachs now expects, swap rates climb again, and fixed mortgage rates mark another leg higher.
The upside case is that energy prices roll over quickly, core inflation stays anchored, and the market's 30 per cent hike probability evaporates. Swap rates would fall back, and lenders — competing hard for business — could trim the fixed rates they added this week.
For borrowers, the practical implication is timing rather than prediction. With offer windows shrinking and deals disappearing amid the volatility, the old advice holds: if you need to remortgage soon, locking in a rate now protects against further rises, while keeping the deal under review leaves room to switch if rates improve before completion.
The verdict: this is a cyclical energy shock transmitted through swap markets, not yet a structural break in monetary policy — but the line between the two is thin, and it is drawn in the next two inflation prints. Borrowers are paying today for a rate rise that most economists still do not expect. If those economists are right, the market is charging a fear premium on long-dated money; if they are wrong, that premium will look cheap in hindsight.
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