I so so hope that the way in which the CCTV has been collected and shared is not in breach of GDPR.
Does the school's data protection policy for the CCTV - as shared with the Information Commissioners Office - include the purpose of investigating collisions on the road? Identifying persons in cars on that road and in their private driveways opposite?
We're the neighbours informed that they were under surveillance?
Does that policy include that the CCTV data can be shared with staff members and their relatives?
Hopefully this is all in place, as otherwise writing to tell someone they (as an individual not just their car) have been identified from the school CCTV, including on their driveway and that has been shared could prove very costly for the school!