Residents in Greenwich say they are still waiting for their park to be cleared four weeks after the end of the Olympic and Paralympic games.
Greenwich Park was the location for the equestrian events - something local protesters say it wasn't suitable for.
Ria Chatterjee reports.
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Around 60 firefighters tackled the blaze at the four-storey building in Daleham Gardens, Hampstead, that broke out early on Tuesday.
It is the fourth time in five years that the London borough has topped the rankings, according to data from the ONS.
Catherine Burke's body was discovered at a house in a quiet street in Muswell Hill last Thursday evening.