Bailiffs are expected to evict 11 families from the property today. The Metropolitan Police said the lease on the building expired last December and would now be sold.
The remaining residents have been given another month before they have to move but although some have found new accommodation others say they will be homeless.
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The memorial will focus on remembering the 71 victims of the tower block fire.
A woman died as she crossed the road when she was struck by four separate motorists who police believe did not stop.
Patrols including local volunteers have been set up after the grisly finds in Thamesmead in the last month.