Dear British friend,
"Oh how the mighty have fallen..." a quote from the Bible and my feelings exactly. This in a country that 60 years ago repulsed the mighty Nazi hordes! I did not know the terrible "state" of affairs when it came to self defence in Britain!!!
Arizona is an "open carry" state here in the US. That means you can carry a gun/knife on you as long as it is within open sight (there are of course restrictions upon this in government buildings/bars/ etc.)
I had thought I wanted to visit the UK, but no longer!!!