from the stokefest website:

"Clissold Park has a premises license permitting events with a maximum capacity of 15,000 people in one portion of the park. For years we’ve had to stick to extremely limited print marketing runs and media-feature blackouts in order to get permission from Hackney Council to run the event; this has made it extremely difficult for our producing partners to solicit sponsorship to pay for their areas.

Additionally, Hackney Council's Parks and Licensing Departments, alongside Hackney Police Licensing Department, has developed an outdoor events policy stating that any event over 3,000 capacity must be completely fenced in. This is not an altogether unreasonable policy in itself, and is only there in principle to negate any potential risks of having lots of us all having a great laugh in one place at the same time. Unfortunately we, as the organisers of Stokefest, cannot bring ourselves to organise a free community festival inside a great big steel box! It just doesn’t feel right. We feel sure that the atmosphere will change, the essence of what we all collectively had would be diluted, and our memories of the fun we had would be tainted by the security systems, ridiculous entry conditions and a general lack of freedom."

That's hackney council for you. First the marhes then Stoke newington festival I bet there's some rubbish council event devoid of any local input put in it's place charging people for entry etc all to line their own pockets.