UK diesel prices recorded their biggest monthly fall on record in June, according to RAC Fuel Watch data, as lower oil prices fed through to forecourts.
The average price of diesel fell by 16.6 pence per litre over the month, dropping from 183.75p at the start of June to 167.14p by the end.
The RAC said this was the largest monthly fall since it began tracking fuel prices in 2000, exceeding the previous record drop seen in May 2023.
Petrol prices also declined, with the average price of unleaded falling by almost 8p per litre, from 159.37p to 151.40p.
The reductions followed a sharp fall in crude oil prices in June, after a deal between the US and Iran eased concerns over energy supplies.
RAC head of policy Simon Williams said June had been a much better month for drivers, with lower oil prices reflected at the pumps.
The RAC said the fall in diesel prices saved drivers around £9 on the cost of filling a typical 55-litre family car, while the drop in petrol saved around £4.40 per tank.
Supermarket diesel prices fell even more sharply, dropping by around 19p per litre on average during the month.
Despite the relief for motorists, fuel prices remain above levels seen before the latest escalation in the Middle East. The RAC said petrol could fall below 150p per litre and diesel below 160p if oil prices continue to weaken.
