'Stranger Danger' Chat

[MingMingtheWonderPet]

We are about to let 7 year old DS walk to meet his Dad from the station, pop to local shops etc on his own (no busy roads to cross).
I would like to have a chat with him about safety, esp 'stranger danger', but don't want to terrify him so much that his does not want to go!
Obviously gonna include 'Don't talk to strangers', 'Only go to xxx and then come straight home, don't decide to go somewhere else'.
Anything else that I should be including?

What to do if someone is doing something which upsets or worries you - it's Ok to make a fuss, say No loudly etc. Who to go to in case of problems policeman, a mum with children, staff in a shop.

Also, not to go anywhere with anyone, even if not a stranger - it's not ok to go off to a friend's house without checking home first, even if it's somewhere you can usually go.

I read somewhere that the best way to teach a child to be safe is to tell them they must never go anywhere with anyone unless they tell the person who is looking after them first, even if they think that person knows already.
For example, you are at home with DC and granny arrives and everyone knows she is going to take DC to the park for a while but just before they leave Dc says to you 'Granny is taking me to the park now' and you go 'ok, that's fine, have a nice time'

It has to have become second nature so they don't even have to think about it. iyswim