Don’t worry. The Brits have a gun ban.
Having a gun would help if a jihadi came up to you and said he was going to hack you to pieces with a meat cleaver and then gave you the time to pull your gun out. But they aren’t that stupid. You wouldn’t realize you were in danger until you felt a crack on the back of your head knocking you unconcious.
I would rather be hit in the head with a meat cleaver while carrying a gun, than be hit in the head with a meat cleaver while not carrying a gun. And, if the onlookers were armed with as many guns as they are with cell-phones and video cameras, the world would be a much more polite place and Mr. Perpetually Pissed-Off Muslim would not have as much time to cut off someone’s head.
You’re right. We are helpless.