This data breach log is created to help your organisation keep track of all data breaches. You may like to use it with the below tools, or with similar tools your organisation already holds:

• The incident management policy- template 
• The incident management - model flow diagram
• Incident severity assessment - template
• Logging and reporting incidents internally - template
• ICO incident report - template
• Breach management plan - template

You may have to adapt aspects of the template further to ensure it is a good fit for your organisation.