Acid attacks are common in the Middle East and Central Asia. Usually targeted at women who reject a man’s advancements or proposal, or shame the family, the are on the rise in even more economically developed countries in the that region of the world, such as Iran and India.
Having already banned guns, and nearly outlawed knives, London has to severely limit the sales of acid and other household chemicals to stop these attacks.
Evil, savage people will always figure out how to hurt someone if that is their desire. No amount of bans and restrictions will stop that.
When London has outlawed every weapon, chemical, and sharp or heavy object, these people will turn to eye gouging with their fingers, I guarantee it.