A man charged over possessing a gun will appear at Croydon Crown Court later this month.
Roman Nikolajevs, 20, of Eaton Road, is charged with conspiracy to possess firearms with intent to endanger life and conspiracy to commit grievous bodily harm.
Two other men have been charged in connection with the same investigation.
Adam Ali, 20, and Abdullah Ali, 28, both of Ederline Avenue in Streatham, were charged on May 24 with possession of a firearm with intent to endanger life.
They will appear at Croydon Crown Court on September 4.
Mr Nikolajevs will appear at Croydon Crown Court on Wednesday, August 26.
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