CMA Flags Concerns Over Rising Fuel Margins
The Competition and Markets Authority (CMA) has published its latest monitoring report on fuel prices, highlighting increases in both pump prices and retailer margins. Between May and August 2025, the average price of petrol rose to 133.9 pence per litre (ppl) and diesel climbed to 141.9ppl. That’s up by 1.9ppl and 3.5ppl respectively. While global oil markets explain part of the increase, the CMA is more concerned about retailers holding onto higher profits at the pump. Margins far above historic levels The CMA found that: Supermarket fuel margins (the difference between selling price and what the supermarket pays for fuel) [...]







