I have been leaving my nearly 11 year old alone for short periods for about the last 6 months or so. He's a single child and very independent. I am self employed and have to drive out to see patients throughout the day. Some days I am only working 2 or 3 hours, other days I work 9am-6pm. On those days where I have patients after school pickup time, I used to take him with me and he could either come in with me to my patient and sit and chat to them, or he would opt to sit in the car with his Ipad or book.
Then we progressed to 'I'm popping up to Tesco's - I'll be 30 mins, do you want to come with me or stay here?' and 99% of the time he's say 'stay here please'. He knows my mobile off by heart, he has my SIL who works from home and lives about 2 mins walk away - and there are my parents who live about a 10 mins walk away (though they spend nearly 4 months of the year abroad).
During the summer he normally stays with my parents abroad but this year due to the up and coming 11+ exams, he stayed at home with me. This meant he chose on some days to come with me, others he walked to my SIL's and other days he'd spend some of it alone at home.
I have always encouraged him to be independent - he has house keys and about once a week walks the 20 mins home from school. I leave him a snack out, a drink and a little note reminding him he needs to 1) practice his guitar...pick up his dirty socks etc...and confirming I'll be home at about 4pm.
When he's home alone, I call him regularly, and he calls me. He knows what he can and can't do. He knows the door stays locked and the chain on. He knows not to tell anyone mummys out, he just says I'm not available right now and come back later. When I am home, he helps with cooking....he can now scramble eggs, he can make a great cheese omelette. I let him use knives, he makes his own toast - he knows if toast gets stuck....don't shove a knife down there but to switch it off, let it go cold and see if he can shake it out etc.
I personally think we molly coddle our kids too much. Granted I live in a rural area, its a large village of about 3000 people but we have a great park, an outdoor pool, our own little cinema. He and his friends will meet up and the park and spend a few hours and come home. He has my father old flip phone which does nothing but make and take calls and texts. He knows what time he is to come home, he knows he goes to the place we have agreed he can go to. If he wants to change plans, he calls me first for my agreement. We still even now talk about stranger danger....I don't sugar coat it for him...I say the dangers as they are.
I think its about teaching kids how to weigh up risks and to chose what is the appropriate course of action. I fully intend my son to grow up making informed choices and he can only do that if I allow him to step out a little without me holding his hand. I am there for him, I am there behind him and I make sure he has the support and love needed for him to be confident in not only what he does but who he is. When he gets things wrong or goes off course a little, I am there to teach him what he could have done better, to discuss with him better ways of handling a situation.
I get told a lot that my son is very mature for his age, that he acts a lot older. I don't think that's entirely true. He still runs around acting like a normal 10 year old, swashbuckling imaginary pirates with a muck old stick, he still has his moments like all kids do. But yes, he is also a very capable boy who is learning how to grow up to be the sort of man I'd be proud of. I do not want him to become a man-child who acts like they have no clue how to turn on the washing machine cos he was never shown. I fully intend for my son to be able to support his partner in the house and all she does. And that starts by enabling him to be independent in appropriate ways