Inflation in the United Kingdom unexpectedly remained unchanged for May, suggesting price pressures were lower than market fears prior to a ceasefire agreement between the US and Iran which triggered a sharp drop in oil prices. The Office for National Statistics reported on Wednesday that the Consumer Price Index rose 2.8% year-on-year in May, matching the April figure and coming in below economists' forecast of 3%.

The statistics office indicated that weaker price increases for food and non-alcoholic beverages helped to contain overall inflation. However, services inflation, a key gauge of domestic price pressures, rose 3.7%, exceeding expectations.

This data appears to support the cautious, wait-and-see stance held by some Bank of England policymakers. The central bank is scheduled to announce its latest interest rate decision on Thursday.

Markets had previously expected the Bank of England to keep its main rate at 3.75% this Thursday. Following the US-Iran ceasefire agreement and the prospect of reopening the Strait of Hormuz, markets have begun questioning whether further rate hikes are necessary. Current market pricing suggests only one more rate increase is expected this year.

The agreement has led to a significant decline in energy prices, fueling market hopes that the negative impact of inflation might be contained. Nonetheless, a rise in UK household energy bills in July is already certain.

The UK government previously announced that, due to the impact of the war in Iran, the energy price cap will increase by 13% starting July 1st, reaching £1,862 (approximately $2,505). Analysts project this 13% increase in the price cap will add around 0.4 percentage points to the inflation rate.

Bank of England officials face a difficult dilemma: a weakening labor market on one side, and inflation that remains significantly above the 2% policy target on the other. There is a risk that if businesses continue to pass on costs and workers subsequently demand higher wages, it could trigger a wage-price spiral.