# United Kingdom Retail Prices Index: Long run series: 1800 to 2024: Jan 1974=100 ()

United Kingdom Retail Prices Index: Long run series: 1800 to 2024: Jan 1974=100 () was up 3.9% year on year in September 2026, compared with 3.4% in August 2026.
The level stood at 1,665.2 (index (1974=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.ITEM-CDKO`
- Frequency: monthly
- Units: index (1974=100)
- Coverage: 1948-01-01 to 2026-09-01 (945 observations)
- Page: https://makrognosis.robomacro.com/data/united-kingdom/retail-prices-index-long-run-series-1800-to-2024-jan-1974-100

## Recent data

| Period | Value | Y/Y % |
|---|---:|---:|
| September 2026 | 1,665.2 | 3.9 |
| August 2026 | 1,663.2 | 3.4 |
| July 2026 | 1,653.3 | 3.2 |
| June 2026 | 1,643.1 | 3.0 |
| May 2026 | 1,638.4 | 3.1 |
| April 2026 | 1,634.8 | 3.0 |
| March 2026 | 1,623.0 | 4.1 |
| February 2026 | 1,610.3 | 3.6 |
| January 2026 | 1,603.2 | 3.7 |
| December 2025 | 1,611.5 | 4.2 |
| November 2025 | 1,600.1 | 3.8 |
| October 2025 | 1,607.2 | 4.3 |
| September 2025 | 1,602.1 | 4.5 |
| August 2025 | 1,608.4 | 4.6 |
| July 2025 | 1,602.5 | 4.8 |
| June 2025 | 1,595.8 | 4.4 |
| May 2025 | 1,589.4 | 4.3 |
| April 2025 | 1,586.7 | 4.5 |
| March 2025 | 1,559.5 | 3.2 |
| February 2025 | 1,554.3 | 3.4 |
| January 2025 | 1,545.3 | 3.6 |
| December 2024 | 1,546.8 | 3.5 |
| November 2024 | 1,542.1 | 3.6 |
| October 2024 | 1,541.3 | 3.4 |

## API

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

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