About this page

This page is a catalogue of the major changes we have made to the data in this Register, in particular to the data available for bulk download in BODS format.

Each entry is a dated set of changes, with an explanation of the changes that were made and any implications they may have for you as a user of our data. Where possible, we'll identify directly which releases of bulk data you'll see these changes in.

08 July 2020

First affected bulk download: Unreleased (July 2020)

  • After a report of duplicate identifiers for UK companies in our output we investigated and realised that we were assigning some company numbers under the wrong identifier scheme. We were also missing an opportunity to output the internal "self link" identifier that Companies House give to Relevant Legal Entities (i.e. intermediate or ultimate corporate owners).

    This affects approximately 28,000 companies from the UK PSC data that were reported as owners of another company and where the disclosure included a 'registration number'. Before, we would output that registration number as a company number under the 'GB-COH' scheme (when the company was declared as being in the UK jurisdiction). Now, we output it under a new named scheme "GB Persons Of Significant Control Register - Registration numbers" - to make it clear that the data is not verified and therefore not directly comparable to the GB-COH identifiers we output from the company numbers identifiying companies' own disclosures.

    In most cases, this simply means that we now output additional identifiers, because we'll also give one under the GB-COH scheme. For total accuracy, you should compare entities via the OpenOwnership register identifiers and remove GB-COH identifiers where they no longer appear in our data.

    In addition, we now output Companies House's internal 'self link' identifiers for all owners, whether legal entity or natural person. We previously did this for all people, and legal entities that had no registration number or were not UK companies. You should simply see more identifiers for some UK companies.

09 December 2019

First affected bulk download: 10th December 2019

  • We now include a lot more identifiers in our bulk data output. As well as the existing identifiers for official registers, these should allow users to link entities to source data, OpenCorporates and back to the Register itself. See our documentation for more information.
  • We now correctly set minimum and maximum values in interests when we have an exact value. A small change but one that makes us more compliant with BODS.

26th November 2019

First affected bulk download: 28th November 2019

  • We now include foreign companies from the Slovakian Public Sector Partners Register (Register partnerov verejn√©ho sektora) where previously we skipped them. This means we have around 1,000 new companies and their owners, and in a few hundred cases, these are also linked to entries in other registers.
  • We've improved how we identify foreign companies in Slovakian data. This means that some SK companies have changed jurisdiction to other countries, and often we can now match those companies to OpenCorporates where we couldn't before.

5th November 2019

First affected bulk download: 7th November 2019

  • We're now regularly importing data from the Ukrainian United State Register of Legal Entities, meaning Ukrainian data is up to date, not just a one-off import from 2018.
  • Our data is now openly-licensed as ODC-BY, requiring only attribution, rather than ODBL which imposed a 'share-alike' condition.