I have a 12 year old very responsible DD. DD has been allowed to shop in towns with her friends without an adult a couple of times, and walks about a mile to & from the bus stop for school on her own when there is no other option, plus has previously been allowed to walk about half a mile into town centre alone. On the occasions she is alone, she texts updates of where she is (i.e. off the bus, on the bus, or arrived in town). We live in a fairly safe small town.
I now have an appointment in a bigger city - as cities go, probably considered a fairly safe city - quite touristy, big cathedral, etc. City centre is pedestrianised. The appointment is at one end of the pedestrianised zone, but DD cannot go with me. DD wants to go into town with me (not a local town, so not easy for us to return another day just to do it together), and browse the shops while I go to my appointment, which will last for 50 minutes. I can keep my phone on, and if something happened and she needed me, I could be there within a couple of minutes if I ran. She doesn't know the city, but she can't get lost - layout is very straight forward.
I feel very torn. On the one hand, it really is a fairly safe city, especially if she sticks to the main precinct - which I would ask her to. She is also a very sensible girl, truly has her head screwed on right. She's never let me down. I have had no problems with letting her walk to local town or shop alone. I have had no problems with us going in different shops when we're at a big shopping centre in our region. She doesn't look like a child, she definitely looks secondary school age.
On the other hand, while I trust her, the world is full of bastards - I'm not sure what I think could happen to her in public in this situation, but I just feel vaguely uncomfortable and am dithering.
So just wondering how others feel about this? What age would you allow a just pre-teen child to shop alone without you right by their side?