Evening edition · Wednesday, 21 October 2026
Britain printed 3.5%, and most of it came through the pump
UK inflation rose to 3.5% in September on motor fuels, while core prices moved less. The euro area showed the same split a week ago. Eight days before the ECB decides, the useful number is the second one.
The Office for National Statistics said on Wednesday that consumer prices rose 3.5% in the 12 months to September, up from 3.1% in August and the highest rate since October 20251. Investing.com called it more than expected, and London’s FTSE 100 lagged the continent in the morning3.
Where it came from. Transport made the largest upward contribution, “particularly motor fuels”1. Petrol averaged 169.5 pence a litre in September, up 8.2p in a month and the highest since August 2022; diesel averaged 192.5p, up 10.7p, the highest since July 20221. Motor fuel prices were 29.8% higher than a year earlier1. Heating oil (kerosene) rose 22.7% in the month1.
Where it did not. Core inflation, which leaves out energy, food, alcohol and tobacco, rose from 2.6% to 2.8%1. Food inflation stayed at 1.3%, the lowest since 20211. Services rose from 3.4% to 3.7%, partly on air fares, which fell less in September than a year earlier1. Desk arithmetic: the gap between headline and core is 0.7 percentage points.
The same picture in Frankfurt’s data. The euro area showed the split more sharply. Headline HICP was 3.8% in September; core was 2.5%2. Desk arithmetic: a gap of 1.3 points. The ECB’s deposit rate is also 2.5%, after rises in June and September2. Lagarde told the IMF’s steering committee last week that wages have “so far shown no material response to the energy shock”2.
Line chart since January 2024 of euro-area HICP inflation, core inflation and the ECB deposit rate. Headline inflation is between 1.7% and 2.8% through 2024 and 2025, is 1.9% in February 2026, then rises after the energy shock to 3.8% in September 2026; core inflation stays between 2.2% and 2.6% through 2026 and is 2.5% in September. The deposit rate steps down from 4% to 2% by mid-2025 and back up to 2.5% by September 2026.
Source Eurostat prc_hicp_minr (CC BY 4.0) · ECB Data Portal FM.D.U2.EUR.4F.KR.DFR.LEV. Eurostat. Reuse authorised under CC BY 4.0 (Commission Decision 2011/833/EU). European Central Bank Data Portal. Reuse permitted with source acknowledgement.
Data (CSV) · SVG · PNG
Latest values as a table
| Date | HICP inflation | Core inflation | ECB deposit rate |
|---|---|---|---|
| 2026-05-01 | 3.2 | 2.6 | 2 |
| 2026-06-01 | 2.8 | 2.4 | 2.25 |
| 2026-07-01 | 2.9 | 2.5 | 2.25 |
| 2026-08-01 | 3.2 | 2.4 | 2.25 |
| 2026-09-01 | 3.8 | 2.5 | 2.5 |
| 2026-10-01 | – | – | 2.5 |
What to take from it. A fuel shock shows up first in the headline and only later, if at all, in the core. The chart shows the deposit rate now level with core inflation, and the headline line well above both. That is the position the Governing Council takes into its meeting on 29 October. Britain’s print adds a second witness, not a new verdict. Nothing here is advice; it is a reading of published numbers.
What to watch
- The ECB's decision on 29 October, with the deposit rate at 2.50% and euro-area core inflation at 2.5%.
- UK services inflation, 3.7% in September; the next UK print is due on 18 November1.
- Food: UK food inflation is 1.3%, but the ONS notes that manufacturers expect it 'to arrive later and persist for longer'1.
Headline inflation tells you what happened at the pump. Core tells you whether it went home with anyone.
Sources
- Consumer price inflation, UK: September 2026 — Office for National Statistics, 21 Oct 2026.
- IMFC Statement by Christine Lagarde, President of the ECB, Bangkok, 17 October 2026 — Bank for International Settlements, posted 20 Oct 2026.
- European shares edge up on earnings support; Big Tech results awaited — Investing.com, 21 Oct 2026.
Every figure in this piece traces to a source above or to the desk’s own arithmetic on those sources, marked as such. Quotations are short and attributed. Spot an error? Write to the desk; corrections are logged on the method page.
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