About this dataset

Comprehensive database of time series covering measures of inflation data for the UK including CPIH, CPI and RPI.

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Previous versions of this data are available

Important notes and usage information

Time series data gives access to a comprehensive database of time series from major national statistics and social economic releases.

From September 2018, we publish the main factors contributing to the differences between the unrounded inflation rates for the CPIH and the RPI.

These differences are broken down into:

  • mortgage interest payments

  • other housing components excluded from the CPIH

  • imputed rents (included in CPIH and excluded from RPI)

  • other differences in the coverage of goods and services

  • the formula effect

The final component titled “other differences including weights” is derived as a residual. These series are published as Table 5a in the Consumer price inflation dataset while the corresponding figures for the Consumer Prices Index (CPI) can be found in Table 5b.

Full historic series for each of the re-referenced indices are now available for users to view or download.

Regular re-referencing of indices is methodological good practice as it avoids rounding issues that can arise from small index values.

Please note that re-referencing does not impact on published inflation rates, although when using the indices to calculate to calculate inflation rates, it is important to use indices that are calculated in the same reference year. Re-referencing does not impact on RPI.

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Andy King
Ffôn: +44 (0)1633 456900