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Take a walk on the wild side and celebrate London's urban green spaces. Get involved in this two-day festival that's filled to brim with all sorts of activities for the whole family. From outdoor yoga to haiku in nature and willow weaving workshops, celebrate the conservation and culture of the great outdoors. There'll also be a huge line up of speakers holding talks on various wildlife themes including the likes of David Lindo from The Urban Birder, TV presenter and biologist Patrick Aryee and ZSL's Vicky Wilkinson. All proceeds from ticketed events will be invested back into the running of Walthamstow Wetlands.