UK GDPR | Art. 19

Notification obligation

regarding rectification or erasure of personal data or restriction of processing

Article 19

 

The controller shall communicate any rectification or erasure of personal data or restriction of processing carried out in accordance with Article 16, Article 17(1) and Article 18 (rectification, erasure or restriction of processing) to each recipient to whom the personal data have been disclosed, unless this proves impossible or involves disproportionate effort. The controller shall inform the data subject about those recipients if the data subject requests it.

 

So if you have disclosed any of the personal data to recipients, ensure they are made aware of the rectification, erasure or restriction of processing.  Another reason to ensure all actionable actions taken under the rights of the data subject are documented or notated.