Sam Woodhead says that he intends to continue his travels in Australia and beyond, despite his ordeal in the outback.
The teenager from Richmond is on a gap-year trip and plans to visit the Himalayas before returning home.
His mother, Claire Derry, who flew out while he was still missing, says she will take a short holiday with him in Brisbane.
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Giroud was clocked at 60mph in a 50mph zone on the North Circular in Willesden.
Police have arrested a lookalike of Friends star David Schwimmer, who failed to turn up at court before Christmas.
The driver of the car, who stopped at the scene and was taken to hospital with non life-threatening injuries, is helping police.