[Uncle Miltie]

Britain already has knife control.

Really.

“The law already prohibits the possession of offensive weapons in a public place, and the possession of knives in public without good reason or lawful authority, with the exception of a folding pocket knife with a blade not exceeding three inches.”

http://news.bbc.co.uk/2/hi/health/4581871.stm

[Trailerpark Badass]

the possession of knives in public without good reason

In England's Sharia courts, Sudden Jihad Syndrome is a probably a "good reason."

[Vanders9]

Well, the US does too. Not allowed to carry switchblades around, except under extreme extenuating circumstances.