Some activities count as regulated activity with children even if you do them only once.
These activities are:
Healthcare
Personal care
Social work
Foster care
Childminding
Childcare provision
Day-to-day management of anyone engaged in regulated activity with children
Example Roles (No Frequency Requirement)
Examples of roles that typically involve this kind of regulated activity include:
Doctor
Nurse
Dentist
Social worker
Foster carer
Counsellor
Therapist
Chaperone
If a role performs these activities with children, it is regulated activity even if it happens only once.
Further Guidance
For more detailed official guidance, you can refer to:
These resources provide the full legal definitions and examples you should use when assessing roles.