A LORRY driver flagged down police in Purley suspicious that there were illegal immigrants in his van in the third incident of this kind in two weeks.
The Metropolitan Police said officers searched the vehicle on Tuesday (December 2) and found nine people on board.
They were arrested on suspicion of immigration offences and taken to a South London police station.
Last Tuesday (November 25) police arrested six people stowed in a container lorry after the driver called them from Godstone Road, Kenley.
And on November 17 a lorry driver pulled over in Thornton Heath and called police, who found six men and women hiding inside the van. They were also arrested.