UK drivers are being hit with excessive fuel prices, particularly when using supermarket petrol stations, the UK's competition watchdog said.
Weakened competition in the sector has led to high prices, which in turn has cost motorists £1.6 billion in the last year alone, the Competition and Markets Authority revealed.
Research found that the profit margins of supermarkets for their fuel businesses had doubled since the start of the pandemic.
“When it comes to road fuel, the simple answer is that drivers are still paying too much," CMA chief executive Sarah Cardell told the BBC.
RAC said the extra costs for drivers were "nothing short of outrageous."
"Drivers have every right to feel ripped off, especially knowing there is virtually no market competition between retailers," said RAC head of policy Simon Williams.