The contractor is supposed to be working on site - not "having fun" with his child or "spending quality time" with his daughter.
She is not an employee or a trainee or an apprentice or on a work experience scheme.
Does the contractor have public liability insurance?
Is it up to date?
Is he covered for injury, death or damage to the property, the residents, other members of the public who may need to enter or pass by the property, for example, neighbours, postmen, delivery drivers?
More importantly, does his public liability cover him for accidents to, or caused by, a 12 year old kid (who is not an employee of his business) larking about on a mini digger while he films her for TikTok? I very much doubt that it would.
If he has hired this piece of equipment, is permitting a 12 year old child to operate machinery in breach of his contract with the plant hire company?
I am amazed at some of the laissez faire comments in this thread.
If he wants to piss around with a digger and his daughter he should do it on his own land. To allow and encourage this on a client's property is negligence.