Just read a 1989 Calvin and Hobbes strip about Calvin being deliberately left home alone, unwisely, for a couple of hours. Calvin is 6.

The NSPCC says there is no set legal age and “while every child is different, we wouldn't recommend leaving a child under 12 years old home alone, particularly for longer periods of time.”

https://www.nspcc.org.uk/advice-for-families/home-alone/

How old were you when your parents first let you be at home alone?

8 or under
39.4%
9-10
27.9%
11-12
16.3%
13 or older, or they still won’t
16.3%
Poll ended at .
Staying home alone

Explore the NSPCC's expert advice on when and how to safely leave your child home alone, including legal guidelines, readiness indicators, and safety tips.

NSPCC
@Nickiquote
I was found on the street while looking for my mum or dad... I don't remember how old I was, but I think I was younger than 8.
@src_esther That sounds traumatic. I remember losing my Dad in a shopping centre around that age.
@Nickiquote
It was midnight. It may sound traumatic, but it wasn't. I didn't feel unsafe. There were other moments that were traumatic, when hired thugs smashed everything to pieces and the police just stood by and watched.