Article 31 Green link
United Kingdom
A link between data from two or more EU information systems shall be classified as green where:
the linked data have different biometric data but share the same identity data and the authority responsible for the manual verification of different identities has concluded that the linked data refer to two different persons;
the linked data have different biometric data, have similar or different identity data, share the same travel document data and the authority responsible for the manual verification of different identities has concluded that the linked data refer to two different persons;
the linked data have different identity data but share the same travel document data, at least one of the EU information systems does not contain biometric data on the person concerned and the authority responsible for the manual verification of different identities has concluded that the linked data refer to two different persons.
Where the CIR or SIS are queried and where a green link exists between data in two or more of the EU information systems, the MID shall indicate that the identity data of the linked data do not correspond to the same person.
If a Member State authority has evidence to suggest that a green link has been incorrectly recorded in the MID, that a green link is out of date or that data were processed in the MID or the EU information systems in breach of this Regulation, it shall check the relevant data stored in the CIR and SIS and shall, if necessary, rectify or erase the link from the MID without delay. That Member State authority shall inform the Member State responsible for the manual verification of different identities without delay.