The United Kingdom’s mortgage market has experienced significant volatility this week, with average fixed rates breaching the 5% threshold for the first time since August 2025. This escalation reflects growing investor concerns regarding the potential inflationary consequences of the ongoing Iran conflict and its anticipated impact on global energy prices.
Major lenders have responded to rising swap rates by implementing substantial repricing across their mortgage portfolios. NatWest, Britain’s largest retail bank, increased its two-year and five-year fixed-rate offerings by up to 35 basis points on Thursday. This action followed similar moves by TSB and HSBC, representing the second round of rate increases within a single week. Nationwide and Virgin Money subsequently announced additional increases of approximately 20 basis points across multiple mortgage products.
The market data compiled by Moneyfacts demonstrates the pace of this correction. The average two-year fixed rate rose from 4.88% on Monday to 5.04% by Thursday afternoon, whilst the average five-year deal climbed from 4.99% to 5.13% over the same period. This movement has been accompanied by a dramatic contraction in product availability, with lenders withdrawing 489 mortgage deals since Monday, the steepest reduction since the turbulence following the 2022 mini-Budget.
The underlying mechanism driving this repricing operates through swap rates, which represent the primary pricing mechanism for residential lending. Two-year swap rates have increased from 3.7% on Friday to 3.9% by Thursday, whilst five-year swap rates have exceeded 4% for the first time in twelve months. These movements reflect market participants’ reassessment of future Bank of England interest rate trajectories in light of anticipated inflationary pressures stemming from Middle East geopolitical risks.
The availability of sub-4% mortgages has become increasingly constrained. Both HSBC and Barclays have withdrawn fixed-rate products below this threshold, targeting purchasers who could access comparable offerings at approximately 3.5% merely one month prior. Market commentators suggest that remaining sub-4% deals are likely to face repricing within days as lenders adjust to the changed environment. NatWest continues to offer selected two-year fixes from 3.97%, albeit with a £1,495 arrangement fee and requiring a 40% deposit, whilst five-year products commence from 4.14%.
The broader economic backdrop compounds these immediate mortgage market pressures. Crude oil prices have reached $100 per barrel, achieving levels not seen since 2022. Market participants now anticipate that the Bank of England may raise base rates to 4% before the conclusion of 2026, reversing previous expectations of further rate reductions this calendar year. This scenario would represent a substantial departure from the policy trajectory anticipated merely weeks ago.
The implications for household finances are considerable, particularly for borrowers with expiring fixed-rate agreements. Comparison site Compare the Market reports that more than 970,000 borrowers hold five-year fixed-rate mortgages scheduled to expire during 2026. These households were already preparing for material increases in monthly repayments based on previous rate assumptions. The current geopolitical developments and corresponding mortgage market repricing now necessitate more pessimistic financial planning scenarios for this substantial cohort of remortgaging borrowers.
The contraction in available mortgage products and the rapid repricing across the market reflect lenders’ responses to elevated uncertainty regarding both near-term inflation dynamics and medium-term interest rate expectations. Mortgage brokers report continuing upward pressure on rates as swap rate movements continue to transmit through to retail pricing. The sustainability of any remaining sub-4% offerings remains questionable given the volatility evident across swap markets and the recalibration of lender pricing strategies.
