The U.K. has descended into madness. The legalities of this don't even really matter, it's disappointing that there is any support for this sort of thing in the first place.
Note that all this refers to big knives, not pocket knives with short blades, which are still completely legal to carry on you without needing any justification.
Seems very reasonable to me. As a result, contrary to the myths, and in spite of guns not being available for attacks, we actually have a fairly low rate of actual knife murder; slightly less than that of the US, I believe.