So the murder rate in London is so bad that the Mayor wants to ban knives.
I have a suggestion. Allow concealed carry of guns. Knife murders WILL go down.
I'm not sure what his position is on the explosion of acid attacks.
London does not have a knife problem.
London does not have an acid problem.
London would not have a gun problem if they allowed general ownership of guns.
London has a cultural problem in that there are a lot of people in their society who are uncivilized and willing to resort to violence. Until they fix their cultural problem, no amount of banning common household items will make things better. This is true in the US, the UK, or wherever there's a lot of violence among people.