They're year 4 and year 6. School is a safe 3-4 min walk from home.
I need to leave by 7.55 to get to work on time, they'd need to leave at 8.25 to get to school for 8.30 with lessons starting at 845.
We have a Yale lock - they wouldn't need to lock up. I would plan on putting coats and bags by the door and setting an alarm for them to remind them when to leave.
I feel they're fine watching TV for 30 mins and letting themselves out but a friend's reaction suggested she thought I was mad. We have lots of friendly neighbours very close by.
This is therefore, a genuine Aibu - happy to be told if I'm being daft even thinking this.