A controversial pro-cannabis festival came to London.

Cannabis plant.

Cannabis plant. Image by Martijn / CC BY-SA 2.0

A crowd of drugs campaigners gathered at the 420 Day Celebration at Hyde Park to hear speeches in support of decriminalisation and to smoke the Class B drug in full view.

Thousands of supporters were greeted by red police warning signs which stated that “Cannabis Is Illegal” and that smokers risked landing themselves in trouble while others handed out cannabis leaf-shaped fliers which declared “End Cannabis Prohibition.”

(Press Association)