Having a chat with a friend about this yesterday. Our DC's are in yr5. Currently walk home from school independently, but parents are home already.
My DF is considering do this in yr6, if her DC feels comfortable. They'd be at home for an hour or so before a parent returns.
I hadn't thought it as something that would be considered before they start secondary school really. My DS is a bit away with the fairies, I'd worry about lost keys etc. I leave him alone at home for short periods already.
I know I wasn't allowed until I was in second year of secondary, but I think my DPs were being a bit super-precious!
So, what do people think / do?