Raw material costs for UK factories rose at their fastest pace on record last month, official figures show.
Rising raw material costs are expected to have a limited impact
The Office for National Statistics (ONS) said the price of goods entering factories rose by 0.9% in December.
The ONS, which started records in 1991, said the rise mainly reflected higher fuel and commodity prices.
At the same time, factory output prices fell 0.2% taking the annual rate to 2.4%, below economists' forecasts for a 2.8% increase.
However, with raw materials only accounting for about 10% of overall costs in industry, the latest figures are expected to have limited impact and should not affect interest rates.
"The sharp pick-up in inflation pressures evident in December's data is likely to be temporary and should not concern the [Bank of England] too much," said Jonathan Loynes of Capital Economics.