A unique reference number allocated by the Registrar of Companies to a limited liability company or unlimited company at the time of first registration of that company.

References:
The e-GIF version approved for use in NHS England is:
Government Data Standards Catalogue: (GDSC), Version 2.1, Agreed 18 November 2004.
Further information can be found on the Cabinet Office website.

This attribute is also known by these names:

Context	Alias
plural	COMPANIES HOUSE REFERENCE NUMBERS