It does seem a bit absurd that any group should be allowed to carry knives in public, whatever the reason.
Correction Ric .
Everybody is allowed to carry a knife on their person when out and about in public places.
The law stipulates that it must be a folding knife,with a blade that is 3" long maximum.
And the blade must not lock when opened, so lock knives are strictly forbidden.
This allows for the fact that a knife is a tool( indeed prehistoric humans first tool were sharp pieces of flint).
Also whilst on the subject, the use of the 2 words " knife crime" is a huge misnomer.
A knife is an inanimate object, I've never heard about a knife or other type of blade jumping out of it's sheath and attacking someone.
The correct term for using a weapon to attack someone is VIOLENT CRIME, and these crimes are committed by VIOLENT CRIMINALS.
I have yet to hear or read about a knife or blades article being found guilty of murder or even manslaughter in a court of law, because as already stated it's an inanimate object with no mind of it's own.
Here endeth the lesson.