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

xls (519.7 kB)

Previous versions

Superseded files Reason for update Date superseded
xls (504.3 kB)
Correction See correction
A small error occurred in quarterly conceptions statistics for April to June 2018, due to a format change to our tables. The quarterly numbers for March 1998 to December 2005 and September 2016 to December 2016 were not correctly aligned with the appropriate column headers, and some columns were duplicated. We have corrected these errors. You can see all previous versions of this data on the previous versions page. We apologise for any inconvenience.
13 September 2019 14:56