The Border Agency ordered squatters to leave their makeshift homes in Hendon last month.
Dozens set up camp on a disused football ground, claiming they had nowhere else to go.
They were offered flights back home to Romania.
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Campaigners have vowed to block the building of a £50 million Holocaust memorial that is due to be built next to Parliament.
The vulnerable 64-year old was last seen in Hoxton at 10.45pm on Thursday 8 December.
Two men have been jailed for a total of 18 years after they were stopped in a mini-cab bringing 10 revolvers into the capital.