I know there is no formal advice online- and it's not a one size fits all...
My ds is yr5 9yo nearly 10.
I'm a single parent so no one else to watch him routinely.
What age did you leave your dc alone for half an hour? I'd like to get back into running but work full time and have ds all but one evening in the week.
I plan to programme the landline so that he can ring me on speed dial if needed, and ensure he knows that he can knock on a neighbour if he was in trouble.
He's desperate to try it to! But I'm not sure if 9/10 is too young?