The UK Consumer Prices Index (CPI) climbed in March as higher food and clothing prices pushed inflation up to 3.5%.
Bucking the downward trend seen for the last six months, CPI inflation rose from 3.4% the previous month, the Office for National Statistics (ONS) said.
It is the first rise since September, and comes despite a series of expected falls in recent months.
Meanwhile, RPI inflation fell to 3.6% from 3.7% in February.
CPI inflation had been creeping towards its 2% target until last month, with 3.4% recorded in February, down from 3.6% in January.
The ONS said the largest upward pressures came from food, clothing and recreation & culture.
Worryingly, the ONS said the downward pressures in March came from electricity, gas and other fuels and transport. However, fuel prices spiked this month amid fears over a strike by tanker drivers, and this could well be seen in next month's reading.
The Bank of England expects inflation will fall towards the 2% target this year, as lacklustre growth continues to be seen.
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