I have read the thread, but have missed the post from a social worker - can someone point me to it, please?
I am astounded - I have called SS because of disclosures made by young people, and in contravention of our own safeguarding policy have been obliged to release children into a situation which is clearly not safe (being violently abused to the extent of broken ribs, not fed and not given bedding etc) because SS have nowhere else to put the child and deem the child not to be in immediate crisis. So I would be very surprised if they would do more than tell a parent of an otherwise well tended child to not leave it alone in future.
It's not the best thing, to leave a child unattended, I have a natural resistance to it (but I did do it, once or twice when DS was tiny, asleep and ion cot) and for a genuine 3 or 4 mins as the shop was 2 doors away(probably to buy a bottle of beer of a bar of choc, possibly milk). But rationally I think the actual risk is miniscule.
When DS was crawling I picked him up and carried him to the loo as I was afraid of leaving him unaccompanied in the bedroom - and tripped on the landing stairs and catapulted him headfirst into the bannisters
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I think the amount drunk, if it was 3 litres, rather than a total of 750mls, and trip out for more is more of a basis of a conversation that I would be having than the principle of the 5 0r 6 mins alone in a cot.
I don't think it's great, but I wouldn't kick him out as a DH and father over it!