UK consumer-price index, a measure of inflation, rose 1.0% in September, official data showed, up from 0.6% in August and ahead of expectations for a 0.9% rise.
Office for National Statistics said this was the biggest monthly increase in the cost of household items for more than two year.
Core CPI was 1.5% in September, up on August's 1.3% and ahead of views for 1.4%, ONS said.
The retail-price index (RPI) hit 2.0% in September, from a gain of 1.8% in August. The print was in line with expectations.
Meantime, the house-price index (HPI) came in at 8.4% on the year, which was ahead of forecasts for 7.9% and from 8.3% previosly.