Assuming you made it through May Day without injuries, Vice UK has a preview of the most common weapons coming soon to a riot near you:
We spoke to buddies of ours in Germany, Egypt and Israel/Palestine to get the lowdown on the weapons that British police may soon be using to pour cold water on your righteous and burning fury.
The backbone in every self-respecting riot control arsenal, tear gas, makes you cry like a baby and stops you from breathing effectively so that you think you’re going to die. Advertised as non-lethal, Sarit Michaeli, spokeswoman from the Israeli human rights group B’Tselem, claims otherwise: “Vulnerable people, like the elderly, children and people with respiratory problems, can be hurt and killed by tear gas.”
[Regarding rubber bullets], “Calling them rubber bullets is quite ridiculous,” says Sarit. “They’re not made of rubber, they’re metal covered with rubber or plastic.

David Hambling writes in