What happened to the worst street in London.

Walk south down the Hornsey Road, turn right at Seven Sisters and you'll get to Whadcoat Street. 

Looking north from Seven Sisters Road.

Whadcoat Street was Campbell Road and Campbell Road was Campbell Bunk, the Worst Street in North London a slum so wretched that its inhabitants sold the glass from their windows, so unlawful that the police steered clear, so insular that the the children from the next street down would be chased out, so notorious that it was knocked down and renamed. 

It's a dark matter version of a National Trust  property - toxic heritage that gets scrubbed out in the hope that people will forget how to misbehave.  Someone should start serving cream teas there.