The ICO exists to empower you through information.
A breach of security leading to accidental or unlawful destruction, loss, alteration, unauthorised disclosure of, or access to, personal data.
Organisations that provide a service letting members of the public to send electronic messages should report personal data breaches here.
Trust Service Providers and Qualified Trust Service must report notifiable breaches to us.
Relevant Digital Service Providers must notify the ICO of an incident under the NIS Regulations.