Sadly this story from Taymount Rise is true. The young lady in question refused to let the mugger take her bag, and as she struggled and was pushed, she fractured her arm. Luckily, her shouts for help drew attention to her plight and she is in one piece, but off work for awhile. I spoke with her a few days after the event, and she was shaken, but not convinced Forest Hill is the crime centre of South London.
It just pays to be alert.