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UK September CPI rises to 3.5%: what matters for sterling
22 October 2026

UK September CPI rises to 3.5%: what matters for sterling

Britain’s September CPI inflation rose to 3.5% from 3.1% in August, the Office for National Statistics reported on 21 October. Core CPI increased to 2.8% from 2.6%, while CPI services inflation reached 3.7%, up from 3.4%. Transport, particularly motor fuels, was the main upward driver of the headline rate’s change. ONS statistical bulletin.

DecodeFX analysis

The market question is whether price pressure will persist after volatile components settle. The services reading makes domestic pricing worth watching, but one month’s annual comparison does not establish the path of future inflation.

For sterling, the relevant channel is how the data change expectations about UK interest rates relative to those elsewhere. A more persistent inflation outlook could support expectations of tighter policy for longer; weaker activity or easing wage pressure could pull in the opposite direction. These are possible responses, rather than a forecast of the next Bank of England decision.

Follow-up should focus on wage growth, labour demand, business pricing and subsequent inflation reports. A release can matter economically without producing a sustained currency move: its effect also depends on prior expectations, global risk sentiment and how the policy outlook in other economies develops.

The Bank of England building in London, photographed on October 11, 2021 (file photo). Photo: Michael C (Bacon Noodles) / Wikimedia Commons, CC0. Photo source and licence.