Community gardens are part of the patchwork that makes up London's open spaces. I spent the day at the Forest Farm Peace Garden in Hainault with a crowd from London Permablitz who do good works across the city with an emphasis on applying the principles of Permaculture. 
 They run an interesting program of events, talks, workshops etc. at Cecil Sharp House in Camden but take the show on the road in a very practical way with the Permablitzes. Typically a group of 10-20 volunteers meet to "blitz" a bunch of tasks over the course of a single day to implement a particular design or project at that location. Tools and materials are provided (and delicious food!).  
 Today was the third such visit to Forest Farm to prepare and plant an area of edible plants which are native or long established in the UK. The project is funded by Kew Garden's "Grow Wild" initiative in the context of Forest Farm's work in providing therapeutic, community and educational resources.