No it's absolutely not right. I would be ringing the police if my child brought this rubbish home.
I think they will be doing the survey at school. And I am not sure you can object.
Other info taken from here: www.angus.gov.uk/council_and_democracy/managing_and_accessing_information/information_governance_privacy_and_gdpr/services_privacy_statements/health_and_wellbeing_privacy_notices?page_id=1100
The information gathered will include your child's candidate number and their school identifier. The info will be seen by local authority staff and Scottish Government staff, and may be shared with a wide range of other researchers.
Here are some of the details of your rights re the processing of the info. Not at all reassuring...
What are my individual rights?
The GDPR gives you the right to object to the processing of your child/children’s personal data. However, where the processing of personal data is for scientific or historical research, or statistical purposes, these rights to object is more restricted.
Further information can be found here – Health and Wellbeing Census Detailed Privacy Notice
Can I object to the processing of my child/children’s health and wellbeing data?
No. As the data we process is lawfully gathered and necessary for the performance of a task carried out for reasons of public interest, you do not have a right to object to the processing of your child/children’s personal data.
Can I ask for my child/children’s health and wellbeing data to be deleted?
No. As we require the data for the performance of a task carried out in the public interest (and for no other purpose, such as direct marketing), we are also not required to erase your personal data as we need to retain this data for this purpose.
Can I ask to see what data you hold about my child/children’s health and wellbeing?
No. As the data we process is lawfully gathered and processed for Research, Statistics and Archiving in the public interest, and that any results of the research or resulting statistics are not made available in a form which identifies your child/children, you do not have a right to request access to the data we hold about your child/children.