English company law says that employees must execute lawful instructions.
There is nothing 'jobsworth' in this attitude, it demonstrates a professional and disciplined attitude.
Hmmm, does "English company law" really say that? Act, Section, any references? I would be interested. Does England have its own laws?
That general line is what I understand the lawyering trade call "The Nurnberg Defence". In short, "Only doing what I'm told, snot my fault innit."
It doesn't stack up any more than the feeble drivel about "it's to protect the adult, not the child". I'll decide what protection I need, thanks, and if I feel threatened by a child next to me I'll ask to move and explain why.