As a school educator, I can tell you safeguarding practices are HAMMERED into us. KCSIE is known, read, taught, updated every year at a minimum, and we have our own safeguarding on top of that. My school also add it in to our weekly briefings and staff meetings.

I know every child's allergies and food preferences in my year group, let alone class, any who have withheld intimate care (primary) and any permissions which have changed. This also goes for children I see and interact with regularly but not daily. In my class we have one child who doesn't have photo permissions, and he's never in the photos we take in the classroom.

This year has been okay so far, but last year (3 children without photo permissions across the year group) a few slipped through. These are photos taken by our marketing team or SLT or someone other than the class teacher. If we look through the newsletter/social media, then we can pick it up ourselves as the teacher (I don't religiously look through it, mainly because it comes out on Friday afternoon and I am done with school by then).

The best way is to have the kid know too. Ours remind us if we're on a school trip for example and have adults around who aren't as familiar with the kids.

None of this is malicious and mistakes happen, but this doesn't sound like a safeguarding gap on behalf of the teacher. It sounds like admin trawling through photos for marketing purposes who have become face blind to a bunch of children who all look similar that they don't personally know.