In the UK you can carry a non locking folding knife with a blade under 3inches in length without any problems,any bigger folder any locking folder or any fixed blade in a public place would cause you a problem unless you had a very good reason to be in possession of it.
So who determines what constitutes a "good reason"?
Amazing to me how these laws get passed and no one steps up against it. I guess once they chip, chip away at your rights you forget you miss them.
Exactly, former communist country

.......a knife with blade length more 5 cm
It is not to protect the owner of the knife, it's like a knife in
the differentiation of utility instruments and as a weapon.The knife as a weapon requires a permit, heaps of certificates.
It's money.
"former commie country" says allot, but I guess your individual rights didn't follow suit? All I gotta ask is who was the nimrod who came up with the graphics that outline the ludicrous restrictions?
Who determines what is the point of length where a knife becomes a weapon versus one for "utility"?
Tell that to the passengers and crew of the 9/11 hijacked planes where the perpetrators used 3" boxcutters - a utility knife.
Sad that you have to live under such austere conditions.
All these laws are bullshit.