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 (490.5 kB)

Previous versions

Superseded files Reason for update Date superseded
xls (490.5 kB) Scheduled update/revision 31 May 2018 13:15
xls (480.8 kB) Scheduled update/revision 31 May 2018 10:37
xls (489.5 kB) Scheduled update/revision 24 May 2018 14:15
xls (464.4 kB) Scheduled update/revision 15 May 2018 09:30
xls (461.3 kB) Scheduled update/revision 16 August 2017 09:30
xls (458.2 kB) Scheduled update/revision 17 May 2017 09:30
xls (454.7 kB) Scheduled update/revision 15 February 2017 09:30
xls (451.6 kB) Scheduled update/revision 16 November 2016 09:30

Important notes and usage information

As a result of the apparent discontinuity and the inconclusive investigations at this stage, comparisons should be treated with caution between Quarter 2 (Apr to June) 2017 and subsequent quarters. Users should be mindful that the data are not seasonally adjusted so any change that they are seeing between consecutive quarters could be due to seasonality.

Users can continue making comparisons prior to the apparent discontinuity, between a given quarter and the same quarter in previous years (we normally advise users to make these “same quarter” comparisons with not seasonally adjusted datasets). Comparisons between periods following the apparent discontinuity should also be treated with caution while investigations continue.

Further recommendations on “same quarter” comparisons after the discontinuity will be given in November 2018 when we publish the data for Quarter 3 (July to Sept) 2018 and we will have a whole year of data after the apparent discontinuity.

An article is available that explains the quality assurance investigations we have conducted so far.

We will continue to investigate possible causes of this apparent discontinuity.