London Green Fair

The Camden Green Fair (and Bikefest) is held on the first Sunday in June from 12noon - 7pm, at Regent's Park in London, England. It usually coincides with World Environment Day and London Sustainability Weeks. The Fair aims to inspire Londoners to help make their capital a world-class Green City, letting visitors find out about the huge and growing number of sustainable companies, products, campaigns, and lifestyle choices that are available to us all, every day.

More information on the Wikipedia page