BoE Rate Decision Complicated by Inflation Miss and Rising Energy Costs

UK inflation accelerated to 3.1% in August, exceeding the Bank of England's target and highlighting a growing gap between actual price pressures and the central bank's assumptions just before its latest interest-rate decision.

The Consumer Prices Index (CPI) rose from 2.9% in July, matching economists' expectations and reaching its highest annual rate since March. However, the more significant comparison for monetary policy is with the BoE's own July projection, which had predicted August inflation at 2.9%. The 0.2 percentage-point miss is small on its own but takes on greater significance when combined with oil prices above $100, rising food costs, and already elevated inflation expectations.

The acceleration in August largely reflects a shock that the BoE cannot directly control. Higher petrol and diesel prices pushed transport costs upwards after renewed Middle East fighting lifted crude prices, potentially adding around 0.2 percentage points to CPI. Pantheon Macroeconomics has estimated that higher electronics prices linked to semiconductor shortages could add another 0.2 percentage points to inflation.

Deutsche Bank expects CPI to peak at about 3.5% in November as energy and other goods-price pressures continue feeding through. The BoE acknowledged in July that risks to its inflation forecast were tilted to the upside because persistent energy costs could eventually influence wages and broader price-setting.