I started babysitting at 12, but the kids I was minding lived in the flat above their parents shop. So I wasn't completely alone with them.

My parents left us alone for short periods from about the age of 11. I remember when Dad had to start work really early, we were to go next door to stay there until it was time for school. Mum had gone away for training. When we were old enough to be left alone for no more than a couple of hours, Grandma's was really close, we had the neighbours and we knew where the police station was.

It depends on the children. But I agree, I wouldn't leave anyone under 14 on their own in another person's house. When they know the lay of the land, where to go for help in an emergency, and know the phone numbers and address, then for shorter periods it can be fine.