Select a 'from' date Select a 'to' date

LRO general policy on legacy (superseded) data

The LRO generally aims to publish most recent data that uses the latest methodologies or data definitions.

Information (particularly datasets) can be subject to such changes. Also, a high proportion of the information available on the LRO is obtained from external sources, whose publications may change beyond the LRO's control.

Where a significant change in data methodology or definition has occurred , different methodologies between earlier and more recent datasets may produce markedly different values. A time-series trend may become affected, and possibly abruptly. This may become evident for example, when viewing a Time-Series trend in a dataset using the LRO Mapping tool.

Where this occurs in datasets on the LRO, we will look to either:

  • Explain the abrupt change of the Time-Series trend within the Metadata (information about the dataset), available by clicking on the More link above the map;
  • or where major modifications have occurred to a data definition, it may be that only the recent revised data is published on the LRO, with the superseded data removed from LRO publication.

One example of the latter is where some earlier Health datasets have been superseded by a national switch to using the revised European Standard Population (ESP, 2013) - click the link for an explanation of the 2013 ESP on the Office for National Statistics (ONS) website.

Lincolnshire County Council Public Health Intelligence have also produced a document that explains the changes for health statistics that use directly standardised rate calculations.

In some cases where superseded data has been removed from publication on the LRO, it might be possible for the LRO to supply the earlier data to LRO website users on request, or to supply contact details of the organisation that produced the data.

If that is relevant to your needs, please contact us at giving details of your request.