I think they may have seen me before I got on the road, so it does all tie in with them hanging around this sort of area, it is hard to believe that it is not the same three people. Would just keep aware and not walk with your phone out, but at the end of the day, once you see a knife you just hand the stuff over as not worth the risk, it is only stuff and the last thing they want to do is hurt someone as then they are in a lot more trouble! I fought them off until the third arrived with the knife. They appeared to really want money, they didn't grasp that I had none as had just come from the gym, hopefully the police will pick them up soon.