Conservative Lambeth Councillor Julia Memery told Liz Wickham that it's a civil case and they expect an eviction by Monday at the latest, if the travellers have not moved on voluntarily by then.
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Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.
The family of Oliver Dearlove urged people to "think again" before using their fists, as the man who killed him began a six-year jail term.
London Fire Brigade took Southwark Council to court on four charges in relation to safety breaches at Lakanal House in Camberwell.