Yep, the advice I've been given is that you really haven't/can't do anything to hurt the other person or carry offensive weapons. You can however make use of everyday things around the home, or your person and you can defend your property too.

The other thing to think about is this - if a robber targets us because he thinks we might not use the police, how likely is he to go to the police himself if you do go over the top?

What's he going to say "Excuse me I wish to report an attack", "oh and what were you doing at the time?", "Err I was robbing a prostitute".

Not going to look very good.

I always carry my bunch of keys in my fist (one between each finger) when I'm walking anywhere at night.  They make an excellent knuckle-duster and if I was attacked  I wouldn't hesitate to use them.

Premeditation?
If you have Self Defence kit or items with potentially dual-use,
....on an open board, Prob best you don't talk about it.  

It really is about situational awareness, learning to read people effectively and being prepared for any eventuality.

There are a few things I could advise on for self defence in the home or person via PM.

I did military training at school and was in law enforcement years ago back home.

Working independently, not sharing accomodation means there wouldn't be any conviction to make - although for ladies who do work in shared accomodation are on much shakier ground if anything does happen.