Shortly after the Information Commissioner issued a very clear message that
“Don’t worry about receiving a fine or other penalty, when you share information in good faith to help identify and safeguard a child you believe is at risk of harm. You won’t get into trouble with us. It will never breach UK data protection law to share all the information you need to with an appropriate person or authority in order to safeguard a child.”
Think, Check, Share campaign video – https://cy.ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/data-sharing/sharing-information-to-safeguard-children-marketing-materials/
the ICO has issued some excellent guidance to support this in the form of a 10-step guide. If you are involved in safeguarding children, then you need to see this at https://ico.org.uk/for-organisations/uk-gdpr-guidance-and-resources/data-sharing/a-10-step-guide-to-sharing-information-to-safeguard-children