Petrol pump prices could soar by 5p a litre, burning a hole in the pockets of holiday motorists, the AA has warned.
A surge in the wholesale cost of petrol across Europe has already led to a rise in UK petrol and diesel prices, with more misery possibly to come, the AA said.
On average, UK petrol prices have risen from 134.61p a litre in mid-June to 135.78p now, while diesel has gone up from 139.16p a month ago to 140.24p now.
The AA said: "A $100-a-tonne increase in the cost of petrol across north west Europe, combined with a weaker pound, heralds a potential 5p increase in pump petrol costs."
It added that should petrol go up 5p a litre then a family from Hounslow in west London, for example, heading off on holiday in a typical family car to Cornwall will pay £2.90 more for the return trip than it would have done in June.