# United Kingdom CPI INDEX 09.5.1 : BOOKS 2015=100 ()

United Kingdom CPI INDEX 09.5.1 : BOOKS 2015=100 () was up 1.4% year on year in September 2026, compared with 1.1% in August 2026.
The level stood at 147.9 (index (2015=100)).
Over the past ten years it has ranged from −12.1% (Jan 2021) to 20.1% (Aug 2023), averaging 4.0%.

- Source agency: UK Office for National Statistics
- Makrognosis code: `UK.CPI.M.NSA.COICOP-09-5-1`
- Frequency: monthly
- Units: index (2015=100)
- Coverage: 1988-01-01 to 2026-09-01 (465 observations)
- Page: https://makrognosis.robomacro.com/data/united-kingdom/cpi-index-09-5-1-books-2015-100

## Recent data

| Period | Value | Y/Y % |
|---|---:|---:|
| September 2026 | 147.9 | 1.4 |
| August 2026 | 151.9 | 1.1 |
| July 2026 | 147.8 | −2.7 |
| June 2026 | 152.1 | −0.7 |
| May 2026 | 153.1 | 0.5 |
| April 2026 | 147.0 | −2.3 |
| March 2026 | 149.6 | 0.4 |
| February 2026 | 146.9 | 1.5 |
| January 2026 | 146.8 | 2.4 |
| December 2025 | 148.5 | 0.8 |
| November 2025 | 146.7 | −2.7 |
| October 2025 | 144.0 | −4.8 |
| September 2025 | 145.9 | −1.9 |
| August 2025 | 150.2 | 3.9 |
| July 2025 | 151.9 | 1.5 |
| June 2025 | 153.2 | 1.3 |
| May 2025 | 152.4 | 0.7 |
| April 2025 | 150.4 | −1.6 |
| March 2025 | 149.0 | 0.07 |
| February 2025 | 144.7 | 2.0 |
| January 2025 | 143.4 | 4.5 |
| December 2024 | 147.3 | 4.6 |
| November 2024 | 150.7 | 5.5 |
| October 2024 | 151.3 | 3.2 |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/UK.CPI.M.NSA.COICOP-09-5-1"

# Python
import requests
r = requests.get("https://makrognosis.robomacro.com/v1/series/UK.CPI.M.NSA.COICOP-09-5-1",
                 headers={"X-API-Key": KEY})
obs = r.json()["observations"]
```