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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Police found two men on the tracks at Old Street at the weekend.
Doctors were forced to put Bilel Ayadi in a medically-induced coma to treat his horrific injuries.
An exclusive poll of the capital's residents for ITV London has found Labour would make sweeping gains if an election were held tomorrow.