Provides files to download data as it existed for this dataset on previous dates.

Statistics are most often revised for 1 of 2 reasons:

  1. For certain statistics initial estimates are released with the expectation that these may be revised and updated as further data becomes available.
  2. Revisions may also be made when methods or systems are changed.

These types of planned revisions should not be confused with errors in released statistics, which are genuine mistakes. Such mistakes occur rarely and, when they do happen, corrections are made in a timely manner, announced and clearly explained to users in line with the Code of Practice for Official Statistics (Principle 2, Practice 7).

Latest version

xlsx (769.4 kB)

Previous versions

Superseded files Reason for update Date superseded
xlsx (776.5 kB)
Correction See correction
We have corrected an error in Table 7 of the 1998 to 2020 and 1998 to 2021 editions of this dataset. The previous versions displayed the units as pounds million within the table heading. It should have been displayed as pounds. None of the figures in the tables are affected by this correction.
31 May 2023 13:36