# United Kingdom RPI All Items Index: Jan 1987=100

United Kingdom RPI All Items Index: Jan 1987=100 was up 3.9% year on year in September 2026, compared with 3.4% in August 2026.
The level stood at 422.1 (Index, Jan 1987=100).
Over the past ten years it has ranged from 0.5% (Aug 2020) to 14.2% (Oct 2022), averaging 4.7%.

- Source agency: UK Office for National Statistics
- Makrognosis code: `UK.RPI.M.NSA`
- Frequency: monthly
- Units: Index, Jan 1987=100
- Coverage: 1987-01-01 to 2026-09-01 (477 observations)
- Page: https://makrognosis.robomacro.com/data/united-kingdom/rpi-all-items-index-jan-1987-100

## Recent data

| Period | Value | Y/Y % |
|---|---:|---:|
| September 2026 | 422.1 | 3.9 |
| August 2026 | 421.6 | 3.4 |
| July 2026 | 419.1 | 3.2 |
| June 2026 | 416.5 | 3.0 |
| May 2026 | 415.3 | 3.1 |
| April 2026 | 414.4 | 3.0 |
| March 2026 | 411.4 | 4.1 |
| February 2026 | 408.2 | 3.6 |
| January 2026 | 406.4 | 3.8 |
| December 2025 | 408.5 | 4.2 |
| November 2025 | 405.6 | 3.8 |
| October 2025 | 407.4 | 4.3 |
| September 2025 | 406.1 | 4.5 |
| August 2025 | 407.7 | 4.6 |
| July 2025 | 406.2 | 4.8 |
| June 2025 | 404.5 | 4.4 |
| May 2025 | 402.9 | 4.3 |
| April 2025 | 402.2 | 4.5 |
| March 2025 | 395.3 | 3.2 |
| February 2025 | 394.0 | 3.4 |
| January 2025 | 391.7 | 3.6 |
| December 2024 | 392.1 | 3.5 |
| November 2024 | 390.9 | 3.6 |
| October 2024 | 390.7 | 3.4 |

## API

```
curl -H "X-API-Key: $MAKROGNOSIS_KEY" \
  "https://makrognosis.robomacro.com/v1/series/UK.RPI.M.NSA"

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