Gully
Monkey in a seagull suit.
You would clearly have to have a common sense approach, if that is possible, to determine the reason for carrying a knife. Clearly a chef with a case full of knives travelling to and from his place of work, or indeed someone like a carpet layer with the tool of his trade would be included, how about a surgeon with a bag full of scalpels? However there is a big difference between carrying the tools of your trade and just being tooled up!