I have been given that information as well very recently by the 'horses mouth' too. during a level 3 safeguarding session during our degree. The 'horses' mouth' is made up of a senior NSPCC worker, a NCMA safeguarding officer and also my LA safeguarding senior team officer. I know who I would rather take notice from and besides - personal choice - I would NEVER EVER leave a child alone. Given that my brother is a fireman - his basic stories alone are enough to NEVER EVER leave a child alone for even a minute.
Whilst its not 'illegal' to leave a child alone, it is up to the parent/guardian to decide if the child is mature and responsible enough to handle that responsibility. IF something was to happen to that child it is more than likely that parent or guardian (or carer) would be prosecuted for neglect and/or more. It is an offence however, to leave that child alone where it could cause harm or put them at risk.
So would you define a young child or 6 months, 6 years or even 10 years mature and responsible enough to be left on their own in the house? I certainly wouldn't.
The 'advice' that you give is wrong and misleading - if people were to think that its ok to leave children alone - there could be all sorts of interpretations of 'acceptable'.
It is NEVER acceptable to leave a child alone.
Q. Is there a legal age at which children can be left at home alone?
A. No, there is no minimum in either Scotland or England and Wales. The law takes the view that one 13-year-old could be very mature while a 15-year-old equally immature.
Q. Does that mean a parent cannot be prosecuted for leaving their child alone?
A. Not for leaving them alone, per se, but they can be prosecuted if they did not provide enough food, warmth, entertainment or access to emergency help. Or if they were likely to come to harm.
It is also dependant on the length of time the parent is absent. So while half an hour after school might be acceptable, overnight might not.
The 1933 Children and Young Persons Act says it is wilful neglect for a parent to leave a child unsupervised "in a manner likely to cause unnecessary suffering or injury to health".
Q. At what age is it advisable to leave a child alone?
A. It depends on the child. But we would recommend to parents that by 16, a child is being left on his or her own as part of the preparation they need for adulthood. It should be done gradually. The most important thing is that the child is happy.
Are the stories in the news this week isolated cases?
According to a 2000 NSPCC survey, 6% of under-12s "experience a serious absence of care", including frequently going hungry, having to go school in dirty clothes, and not being taken to a doctor when ill.
The survey found 6% of parents think it is acceptable to leave a 12 or 13-year-old alone overnight.
(taken from the BBC website) NOTE that they are talking about much older children here.
www.nspcc.org.uk/help-and-advice/for-parents-and-carers/positive-parenting/leaving-children-home-alone/leaving-children-home-alone_wda72908.html