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Finance & Markets · Europe

UK inflation rises to 3.5% as fuel prices push up September costs

The Office for National Statistics reported that UK CPI inflation reached 3.5% in September, up from 3.1% in August. Higher fuel prices were the main driver, and the rate was the highest since October last year.

AI-assisted synthesis · Based on 8 outlets' reporting · Article text read from 3 of 8 outletsHow it's made

View timeline · 7 entries
8 outlets2 regionsLatest reporting 3 min read
Coverage: MixedL 1 · C 2 · R 1 · 4 unrated
Updat3 graphic: United Kingdom
Updat3 graphic

What happened

Key facts

  • UK CPI inflation reached 3.5% in September, up from 3.1% in August (per lbc.co.uk, indexbox.io).
  • The Office for National Statistics reported the September inflation figures (per lbc.co.uk, upday.com, indexbox.io).
  • The September rate was the highest in almost a year; lbc.co.uk specifies that the previous comparable high was 3.6% in October last year (per lbc.co.uk, upday.com).
  • September inflation was higher than economists had expected; lbc.co.uk gives the expected rate as 3.4% (per lbc.co.uk, upday.com).
  • Higher petrol and diesel prices drove the increase; lbc.co.uk quotes ONS chief economist Grant Fitzner saying fuel prices were the main driver (per lbc.co.uk).
  • Inflation increased by 0.4% on a monthly basis (per upday.com).
  • Core inflation rose to 2.8% from 2.6% in August; the measure excludes energy, food, alcohol and tobacco (per upday.com).

The brief

UK consumer-price inflation rose to 3.5% in September from 3.1% in August, the Office for National Statistics reported. Higher petrol and diesel prices drove the increase, which brought the annual rate to its highest level in almost a year. The figures show a faster rise in prices than in August, while the separate monthly measure increased by 0.4%.

The September reading was above the 3.4% economists had expected, according to the comparison reported by LBC. LBC also put the latest annual rate in context: it was the highest since the 3.6% recorded in October last year.

The Office for National Statistics publishes the UK’s consumer-price measures; its release covers CPI alongside CPIH and RPI, according to IndexBox’s description of the release. Fuel was central to the rise.

LBC quoted ONS chief economist Grant Fitzner as saying increased fuel prices were again the main driver, and reported that diesel had reached its highest cost since July 2022. Upday likewise linked the increase to petrol and diesel prices, while emphasizing that transportation costs provided the largest upward pressure on consumer prices.

The two accounts point to fuel and transport as important contributors, but their descriptions differ in emphasis: LBC highlights fuel prices and diesel, while Upday foregrounds transportation costs. Upday reported that core inflation, which excludes energy, food, alcohol and tobacco, rose to 2.8% from 2.6% in August.

That measure also increased, though it excludes several categories that contribute to the headline rate. Upday additionally reported petrol above £1.70 per litre and diesel above £2 per litre; those pump-price figures are specific to its account. The rise may figure in the government’s consideration of household cost support.

LBC reported that experts said the inflation figures could add pressure on Mr Healey to announce cost-of-living measures in his autumn Budget statement the following week. That is a reported possibility, not a confirmed policy commitment; the coverage does not identify a particular support measure. The reports offer distinct context for the price increase.

LBC described a Middle East energy shock as raising fuel and household energy prices, while Upday attributed the fuel-price surge to conflict in the Middle East. Both accounts connect energy costs to the inflation rise, but neither provides a breakdown quantifying how much of September’s 3.5% rate came from fuel, household energy or other categories.

The immediate policy question raised in the coverage is whether the Budget will include cost-of-living support as prices continue to rise.

Why it matters

  • UK households face higher consumer prices: CPI reached 3.5% annually in September, with fuel and transport costs identified as major upward pressures.
  • Drivers face elevated pump prices; Upday reported petrol above £1.70 per litre and diesel above £2 per litre, while LBC said diesel was at its highest cost since July 2022.
  • The increase could raise pressure on Mr Healey to announce cost-of-living support in the autumn Budget, although no specific measure is confirmed.
  • Core inflation also rose, reaching 2.8% from 2.6% in August, even though that measure excludes energy, food, alcohol and tobacco.

What to watch next

  • Whether Mr Healey announces cost-of-living support in his autumn Budget statement the following week, as LBC reported experts suggested.
  • Whether the Office for National Statistics’ subsequent CPI releases show changes in the annual rate from September’s 3.5%.
  • Whether fuel prices continue to feature as a main driver in later inflation figures, as described by Grant Fitzner and Upday.
  • Whether core inflation moves from September’s 2.8%, after rising from 2.6% in August.

How it's being covered

Coverage analysisShow details
9 source articles · 8 unique outlets
Outlet political mix: Mixed· 1 Left · 2 Center · 1 Right · 4 unrated
Where the outlets are based: Europe 63% · Unknown 25% · Other 12%
Outlet political mix
Mixed
Left
Center
Right
1 outlet
2 outlets
1 outlet
The marker shows coverage balance: each unique outlet counts once. 4 unrated outlets are not included.
Geography
Where the outlets covering this story are based.
8 unique outletsDominant coverage: Europe
How we measure coverage

How outlets' accounts compare

2 framing differences · 4 uncorroborated claims · 2 information gaps
The reports repeat the same account with different emphasis; its central claims are not independently confirmed in the reporting Updat3 read.Compared across 3 reports whose article text Updat3 read; 5 other outlets were checked by headline only.
Framing / emphasis differences
Sources emphasise different angles, actors or consequences of the same reporting.
  • LBC emphasizes rising petrol and diesel costs and quotes Grant Fitzner calling fuel the main driver; Upday stresses transportation costs as the largest upward pressure.
  • Upday links the fuel-price surge to conflict in the Middle East; LBC describes a Middle East energy shock as raising fuel and household energy prices. Neither account quantifies the conflict’s contribution to September’s inflation rate.
Updat3: These are differences of emphasis, not disputes about what is reported. They do not show that the reported claims are true.
One-sided or uncorroborated claims
Claims that come from one party or one source family and are not independently corroborated.
  • Both LBC and Upday connect fuel-price increases with the inflation rise, but LBC describes fuel as the main driver while Upday identifies transportation costs as the largest upward pressure.
  • LBC attributes the main-driver assessment to ONS chief economist Grant Fitzner; Upday presents its account of transport costs without naming an individual source for that assessment.
  • LBC quotes ONS chief economist Grant Fitzner saying increased fuel prices were again the main driver.
  • LBC reports that experts said the figures could increase pressure on Mr Healey to announce cost-of-living support.
Updat3: Not independently corroborated yet — treat as a claim, not an established fact.
Not established by the reporting
Information the available reporting does not contain or confirm. This is a gap, not a disagreement.
  • The sources do not provide a category-by-category contribution showing how much fuel, household energy or transport added to the 3.5% annual rate.
  • The sources do not specify which cost-of-living support measures, if any, Mr Healey may announce.
Updat3: Updat3 cannot conclude anything about this from the current sources.

Timeline

Developments from this story's sources, dated background we compiled and fact-checked, and our earlier coverage. Each row says which.
  1. The Office for National Statistics was formed by merging existing government statistical agencies.
    Background · compiled and fact-checked by Updat3
  2. The Bank of England’s 2% inflation target, set by the government in 1997, provides the central benchmark for UK monetary policy.
    Background · from our historical context
  3. The UK also has a long-standing system for adjusting household energy bills through the Ofgem price cap, introduced in January 2019.
    Background · from our historical context
  4. In response to rising household bills, the government introduced the Energy Price Guarantee in October 2022, limiting the unit prices suppliers could charge households.
    Background · from our historical context
  5. UK CPI inflation reached 11.1% in October 2022, its highest rate in four decades.
    Background · from our historical context
  6. On 28 February 2026, the United States and Israel launched coordinated strikes on Iran, including attacks on power plants, air defences and military infrastructure.
    Background · from our historical context
  7. The ONS reported that UK CPI inflation was 3.1%.
    Background · compiled and fact-checked by Updat3

How we got here

Before September 2026, the Office for National Statistics had reported UK CPI inflation of 3.1% in August. The Bank of England’s 2% inflation target, set by the government in 1997, provides the central benchmark for UK monetary policy.

The ONS’s Consumer Prices Index measures the changing prices of a basket of goods and services; CPIH adds owner-occupiers’ housing costs, while the Retail Prices Index uses a different calculation and remains in use for some contracts and financial products.

Original sources

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