As a Herne Hill resident who regularly uses Brockwell Park and has attended festivals there, my considered view is that this is a tricky issue with good points on both sides and the precise legal status of the park seems to be unhelpful in creating a mutually acceptable outcome. Hope that helps!
RE: 
Bluesky Social
Jim Waterson (@jim.londoncentric.media)
MASSIVE legal verdict just in for festivals in London parks.... Questions over whether Mighty Hoopla and Field Day and can go ahead this month.......
