This is outrageous! It is apparent the UK needs sausage control! Where will the vicious victuals strike next?
Well, with handguns unavailable to all except criminals and pointed knives soon to follow, it seems a logical progression that the typical amateur scofflaw's next-tier weaponry choice will be food items. Advantages include easy disposal after the crime (eating or feeding it to a nearby pet) as well as simple procurement at reasonable, market-driven prices.
A garden-variety carrot kept in a deep freezer for a couple of days would likely serve as an effective stabbing weapon, and the perpetrator would only need to feed it to a nearby weasel after the deed in order to eliminate the evidence.