Inflation rose sharply to 1.9% in June but is still enjoying its longest stretch at or below the Bank of England's 2% target for nine years, official figures showed today.
The steeper-than-expected increase in the Consumer Price Index (CPI) measure of inflation, from a four-and-a-half-year low of 1.5% in May, saw it climb to its highest level since the start of the year.
This may exert pressure on policy-makers as they consider when to hike interest rates which have been at the historic low of 0.5% for more than five years.
But the figures from the Office for National Statistics (ONS) also mean that CPI has been at or below the 2% target for seven months in a row, the first time this has happened since 2005.
Inflation had been dragged down by the supermarket price war which saw food and non-alcoholic drinks costs fall in May but these were flat in June.
Meanwhile clothing and footwear prices rose month on month at a time when they are usually falling - as this time stores held off on summer discounts as warm weather brought shoppers out.
Furniture, air fares and sea transport also had an upward effect but petrol prices went up by less than the same month a year before.
Despite the drop in inflation, it remains well above the rate of wage increases, which were last recorded at 0.7%, meaning real-terms pay is still stalling. Figures to May will be published tomorrow.
Today's data showed the Retail Prices Index (RPI) measure of inflation, which includes housing costs, rose from 2.4% to 2.6%.
Sterling jumped back above the 1.71 US dollar mark on expectations that the latest figures will raise the chances of an interest rate hike.
Jeremy Cook, chief economist at currency company World First, said the rise in inflation was a "big surprise".
He added: "This will encourage those economists and rate-watchers looking for a tightening of Bank of England monetary policy this year, but for those who are seeing below-inflation wage increases, the situation just got a little more painful."
Chris Williamson, chief economist at Markit, said: "With inflation almost hitting the Bank of England's 2% target, the housing market booming, the economy growing strongly with no signs of momentum being lost and unemployment plummeting, the case for higher interest rates is building."
Howard Archer, chief UK and European economist at IHS Global Insight, said: "June's rise in inflation is disappointing news for both consumers and the Bank of England.
"The rise back up in inflation squeezes consumers' purchasing power, especially as earnings growth currently remains muted."
Samuel Tombs, of Capital Economics, said the sharp rise in inflation was likely to be reversed soon, with the supermarket price war meaning a significant rise in food price inflation seemed unlikely.
He said the full impact of the strong pound was also yet to be felt, while a fall in wholesale gas and electricity prices could dampen energy bill hikes this winter.
"We maintain our long-standing forecast that CPI inflation could ease to about 1% by the end of this year and remain below the 2% target in 2015," he said.
"Not only would this enable real earnings to finally stage a recovery, but it should also give the MPC (Monetary Policy Committee) scope to raise interest rates only gradually next year."
James Knightley, of ING Bank, said inflation was likely to remain subdued in the near term but that the improving economic picture should see a "gradual build-up in domestic inflation pressures".
With the Bank of England looking ahead to the picture in two years' time, this was likely to mean a first interest rate hike in November this year, he said.
"This would also remove political concerns of waiting until early next year when election campaigning is in full swing," he added.
A Treasury spokesman said: "The Government's long-term economic plan is working, with today marking the sixth consecutive month that inflation has been below the Bank of England's 2% target."