The UK's inflation rate dropped unexpectedly to 2.6% in June, down from 2.9% in May.
It is the first fall in the rate since October 2016 and was largely down to lower petrol and diesel prices.
Fuel prices fell for the fourth month in a row in June, according to the Office for National Statistics.
However, inflation is still running ahead of average wage inflation, which stands at 2% excluding bonuses.
The UK inflation rate has risen sharply since the referendum on membership of the European Union last June, partly due to an increase in the cost of imported goods following the fall in the value of the pound.
That rise has put pressure on the Bank of England to raise interest rates, but economists say the latest figures will ease that pressure.
These numbers are a real surprise, showing the first drop in inflation since autumn 2016," said Lucy O'Carroll, chief economist at Aberdeen Asset Management.
"This is going to kill the chances of a rate rise in the short term. We'll learn more about the Bank of England's thinking in a couple of weeks, but we can expect the calls for a rate rise to reduce to a whimper."
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But June's fall in inflation is a blip, according to some economists.
"We have not necessarily passed the peak of inflation," said Andrew Sentance, senior economic adviser at PwC.
"Oil prices are volatile and could bounce back later this year. Meanwhile, the big fall in the value of the pound since last summer is still working its way through the pipeline and has not yet fully fed through into shop prices."
Another measure of inflation, the Retail Price Index (RPI), edged lower from an annual rate of 3.9% in May to 3.8% in June. RPI is used to calculate the interest rate for student loans, for example.
The ONS also reports a version of consumer price inflation that includes housing costs known as CPIH. That rate fell to 2.6% in June from 2.7% in May. source-bbc.co.uk
Even though the effect of the inflation drop will affect the economy, this might come as some type of good news for us as we'll see the effect of this drop on food prices at the till.