Police are appealing for information after a minicab driver was assaulted and robbed in Plumstead.
The driver picked up a man from Invermore Place at about 3pm on December 12.
The passenger asked him to drive to Crayford railway station, then Erith railway station - where a black girl, in her teens, was picked up.
An image of the man police want to speak to
The trio then travelled back to Crayford station where the girl was dropped off between 3pm and 4pm.
During the journey, a number of arguments broke out between the driver and passenger.
The driver asked to be paid in advance and for extra cash for the journeys to the stations.
A police image of the suspect
Just before 4pm, the passenger asked the driver to take him back to Invermore Place, close to the garages near Walmer Terrace.
On the way there, the passenger made a call asking the person on the other line to meet him there.
Once the cab arrived, the driver noticed five black men waiting in the area.
The driver was told to give back the fare, before being dragged out of his silver Skoda and assaulted.
About £30 change from inside his vehicle was taken.
The driver was left with head injuries, an injury to his hand and bruising.
The suspect is described as a black man, aged in his 20s, of slim build, with a beard. He spoke with an African accent.
The assault was filmed on a mobile phone by one of the men standing by and uploaded on Twitter.
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Detective Constable Danny Banks, from Greenwich CID, said: "We want to urgently speak with anyone who saw this vicious robbery and assault, or who is aware of this incident and can assist with our ongoing investigation."
Anyone with information should contact police via 101 or Crimestoppers anonymously on 0800 555 111. Calls to Crimestoppers are free.
You may receive a cash reward of up to £1,000 if the information you give to Crimestoppers leads to one or more people being arrested and charged. This will be paid anonymously.
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