Blogger and former Hackney resident Throbbingsofnoontide has written a great personal account of the squatting scene on Stamford Hill Estate in the late 1980s.
And also some unpleasant memories of being fitted up by the notoriously corrupt Stoke Newington police:
http://throbbingsofnoontide.wordpress.com/2012/08/26/its-a-fair-cop-oh-wait/
For more info on the police corruption of the era, see Fighting The Lawmen, published by Hackney Community Defence Association.
The Radical History of Hackney 