While we strive to release data of the highest quality we know sometimes that we could do better. This month we are improving our Price Paid Dataset by removing historic transactions that were added in error.

Recently a customer reported some duplicate entries in our 2003 and 2004 Price Paid Dataset. After investigation we found there had been an internal error with a process used to cancel applications. Price paid entries were not removed when they should have been. That process changed early in 2005. We’ve now corrected the data and will be removing around 48,000 transactions from a dataset that contains over 19 million. There were approximately 18,000 duplicates in 2003, 30,000 in 2004 and less than 100 from 2005.

The invalid entries will be removed from each version of the yearly files that we publish through GOV.UK and from the single complete file of all Price Paid transactions. The change will also be applied to the open data used by Price Paid Report Builder in the same month.

We will be publishing a file on GOV.UK that contains details of all the invalid entries on 28 November 2014. The file will be in the same form as the monthly update, which can be used to update data stores. Each record in the update files will have a record status set to ‘D’.

Despite the number of transactions affected, we can confirm that there is no impact on the House Price Index figure published each month. However sales volume figures will change.

If you have any queries or concerns over this correction please contact us at commercial.services@landregistry.gov.uk. We welcome your feedback.

Chris Jones
By Chris Jones,
Data Analyst at HM Land Registry