10 October 2026. Price snapshot: 10:30 BST.
New diesel supply promises are moving financial markets. At UK forecourts, our latest matched analysis shows only a small weekly fall.
Fuel Finder UK followed the same 5,881 qualifying diesel forecourts over the past week. Their average reported price fell by 0.32p a litre, equivalent to about 18p on a 55-litre fill.
The average hides a more revealing result: price rises at some forecourts offset 56.2% of the value of reductions recorded at others, measured in pence per litre. A third of this matched panel cut diesel prices, while a fifth raised them.
Friday evening's Russian diesel announcement arrived near the end of this seven-day comparison. These figures provide a starting point for assessing whether further supply relief reaches UK drivers.
Where the diesel cuts went
Between 3 and 10 October, 1,979 forecourts in the matched diesel panel reduced their prices. Their average reduction was 2.20p a litre. At those forecourts, that average cut would save about £1.21 on a 55-litre fill.
But 1,177 forecourts increased their prices by an average of 2.08p a litre. Another 2,725 finished the week at the same price as they started.
Giving every forecourt equal weight, the reductions contributed a 0.74p fall to the panel average. The increases added 0.42p back, leaving a net fall of 0.32p.
This measures changes between two price snapshots. A forecourt may have changed its price more than once during the week; the analysis does not count every repricing event or measure drivers' actual spending.
The latest day is less encouraging for diesel
Over the 24 hours ending at the same Saturday-morning cutoff, 610 diesel forecourts increased prices and 434 reduced them. The remaining 4,837 were unchanged. The panel average edged up by 0.09p a litre, roughly 5p on a 55-litre fill.
Petrol edged down by 0.03p over the latest day. Across its separate panel of 5,942 forecourts, the weekly fall was 0.22p a litre, equivalent to about 12p on a 55-litre fill.
| Fuel | Matched average on 10 October | 24-hour change | 7-day change | 14-day change |
|---|---|---|---|---|
| Standard diesel | 199.86p/litre | +0.09p | -0.32p | +1.09p |
| Petrol E10 | 174.74p/litre | -0.03p | -0.22p | +0.86p |
Both fuels remain dearer than a fortnight earlier within their respective matched panels. The median weekly change was zero for both: the average fall has not been a uniform reduction across forecourts.
Crude oil and diesel are moving differently
Brent crude futures settled at $104.72 a barrel on Friday 9 October, up 0.42% that day. US WTI closed at $91.85, up 0.39%. Both finished higher than a week earlier as hurricane shutdowns and Middle East shipping risks supported crude prices. Reuters' Friday closing report records those settlements.
Later on Friday, Donald Trump announced that Russia would immediately supply more than 300,000 tonnes of diesel to US and global markets. Reuters reported US diesel futures falling almost 5% after the news. That was a market reaction to the announcement, rather than a UK wholesale price or proof of delivered cargoes. Reuters' report, updated early on 10 October, sets out the deal and its limits.
The US Treasury's General Licence 135, dated 9 October, confirms permission for specified transactions involving Russian-origin diesel. Separately, Reuters reported that China would resume October refined-fuel exports after a holiday pause, citing traders familiar with the plans. That could ease product shortages, although intended exports are not the same as fuel arriving at UK forecourts. Read the China export report.
Is lower wholesale diesel reaching the pumps?
The AA reported on 7 October that wholesale diesel costs had fallen by 6p to 8p a litre. That earlier easing is consistent with the small weekly pump-price reduction in our data. The two figures cover different observations and periods, so dividing one by the other would not establish a pass-through rate. The AA's wholesale update predates Friday's new supply deal.
The CMA's August monitoring report explains that retailers buy fuel in advance and that supply arrangements and contracts affect the lag before wholesale costs reach pumps. Its two-week allowance is a proxy, rather than a fixed timetable.
Establishing the effect of that deal requires subsequent UK wholesale prices, actual supply developments and later forecourt observations. Today's snapshot shows modest weekly relief, with rises elsewhere limiting its effect and a small diesel increase over the latest day.
For drivers, the worthwhile reductions are at individual pumps. Check the prices on your route using Fuel Finder UK, and compare the wider movement on the UK Fuel Price Index.
How we measured it
The cutoff was 10 October 2026 at 10:30:35 BST. We selected currently active, open forecourts with qualifying locations and valid standard-fuel reports, using an accepted per-fuel source or history timestamp within the preceding 14 days. Each fuel's fixed panel also required a valid retained price at the same time one, seven and fourteen days earlier.
Price history records changes rather than daily snapshots. We carried the latest recorded state forward to each comparison time. Standard diesel is primarily B7, with B10 as a possible source fallback; premium diesel is excluded. Every forecourt has equal weight; these averages are not weighted by fuel sales or population. Current station eligibility is applied throughout, and historical unchanged-price reconfirmations are not fully retained.
The 56.2% figure divides the summed net weekly increases by the summed net weekly reductions within the diesel panel. It describes the offset within that panel, not retailer margins or the proportion of wholesale savings retained.
Checks using current reports no older than seven days, tighter historical observation ages, and an exclusion of motorway sites and Costco all retained a weekly fall for both fuels. With a 14-day limit on each historical observation's age, the diesel offset was 42.3%, while the weekly fall and latest daily increase remained. Removing weekly changes larger than 20p left the diesel fall at 0.33p and the petrol fall at 0.21p. These selections change the size of the movement and the mix of forecourts, so the findings remain a descriptive analysis of qualifying reported prices.