I stand humbled by an outsiders knowledge of how my countries laws work. You live in a land of gun culture, ours is a knife culture, I don't lecture you on the stupidity or not of your laws I find it incredible that people are lecturing me on the stupidity of my countries laws.
We are simply discussing how badly this law is written. Gun or knife culture, it matters not, since this law oppresses people who have done nothing wrong, and aren't likely to do anything wrong, while doing absolutely nothing to hinder criminals.
All the law does is create a bunch of "have's" and "have not's" amongst the law-abiding populace.
I wil reiterate, if you are a genuine martial artist, historical renactment society member, Scottish sword dancer etc you will not be prosecuted. You can pass on your swords to your children if you wish.Sikhs will keep whatever weapons they have.
Again, I would ask, what about the 80 year old collector who doesn't practice martial arts? Why does forbidding him from buying a 51 centimeter curved blade make sense? He's not going to go out there and hack and slash people.
The politicians assert that they only want to go after cheap swords... So, the law exempts 100+ year old swords from being banned... What makes a 101 year old sword that was very poorly forged, any more legit than a brand new Angus Trim, Bugei, or Howard Clark sword? Under the law, the 101 year old junker would be allowed, yet a newly made, fine custom Howard Clark katana would be verboten to the above 80 year old man who just wants to have a nice collection.
The law is full of common sense holes, and is the product of ignorant politicians who are trying to enact "feel good" legislation that does nothing to stop criminals.
Even if, by some magical means, cheap swords are taken out of the hands of criminals, it would still accomplish absolutely nothing. Any criminal can create an improvised blade from commonly available materials, and do so in a relatively short time. If you don't believe this, then just look at what goes on in prisons, where prisoners have used anything not solidly bolted down (and in some cases, where they were solidly bolted down) to make some nasty "shivs."
http://www.designobserver.com/archives/shiv1.html