please don't visit Scotland
a fixed blade or a folding blade longer than 3'' WITHOUT due reason to ''carry'' = 5-7 years in the nick
genuine thought, as a regular cyclist could you carry a bigger type swiss army knife or leatherman type multi tool with pliers & screwdriver heads but also including a 3"+ blade claiming it as a tool for bike repairs?
*Edit* I've just measured the longer blade on my swiss champ swiss army knife, it is not quite 3" long, it goes well past pocket knife territory *edit*
I don't think the scotish rozzers will be troubling MJ tho, I also have a pocket knife always with me on my keyring, I've had loads over the years, some razor sharp and capable of doing someone a good bit of damage but the blades are never anywhere near 3 inches, that sort of length makes it quite some knife to be lugging about.