Overnight..
Mm, 5 or 6 I think, parents out for a meal, back after midnight, we'd be left with the neighbours listening in via an intercom system, but we are talking a huge 5 bed semi, over 3 floors (and obviously the same next door), Victorian, high ceilings and thick walls so sound did not travel well and by no means did one intercom allow them to hear whatever was going on!
Next door were happy with it... they were a judge and a headmistress...so not crazy risk taking types.
In the car... left to sleep in the car from younger than that outside venues/pubs.
These were not daily occurrences, but common enough not to be remarkable either.
During the day, probably 9 or 10, I remember walking to and from school by myself being a big deal that I got to do at the age of 7, but that was to a home with Mum in it. I didn't have to come home to an empty house until I hit secondary school and she was still at work.
Then at 16 I was home alone for 3 months as she was sectioned and no one really realised I was living on the money I earned dog sitting (20 a week) and the bills went out of her bank via direct debit.
It only became an issue when the dogs owner moved house and I no longer had that cash income, the summer holidays ended and some of my friends parents realised I had no actual parent anywhere... For some reason, and to this day I don't know why, I didn't tell anyone, didn't ask for help at all! I think the hospital assumed her boyfriend was here with me but he actually disappeared off home 300 miles away literally the moment the ambulance left our house.
Fortunately, I had learned a lot about cooking etc and was pretty independant, but it still shocks me thinking back.