The average price of petrol and diesel at UK filling stations fell slightly during October, according to the RAC.
The motoring organisation said the average cost of a litre of petrol had come down by 2.6p during the month, to 154.53p, while the average litre of diesel was down by a penny, to 161.4p.
This meant an end to a four-month run of consecutive petrol price increases. However, the RAC said that both fuels were still overpriced based on wholesale prices.
It said petrol should currently be available for around 145p per litre, and diesel for around 156p per litre.
RAC fuel spokesman Simon Williams said: “While four months of rising petrol prices came to an end in October, it’s definitely no cause for celebration that the drop was only 2p a litre as our data shows it should have been far greater.
“Instead, drivers will be outraged to learn they are still not being charged a fair price at the pumps by the big four supermarkets which dominate UK fuel retailing.”