The answer depends on whether you read the Treasury's Budget document or the OBR EFO.
- From the Treasury: "The Budget package directly cuts inflation by 0.4 percentage points next year. This is the biggest near-term reduction in inflation due to government policy ever forecast by the OBR at a single fiscal event, outside of a crisis."
- From the OBR: "Government policy measures announced since March are expected to decrease inflation by 0.3 percentage points in 2026 (a peak quarterly impact of 0.5 percentage points in the second quarter of 2026)."
- We are more inclined to trust the OBR numbers here - but its a curious development (unless the Treasury are referring to FY26/27 - seems possible - but isn't explicit in the text).