The ringleader of a drugs gang that included an ex-boyfriend of Charlotte Church has been jailed for 20 years.
Marvin Campbell, 32, from Hackney, attempted to sell 300kg of heroin in London worth £23m, a court heard.
Campbell pleaded guilty to conspiracy to supply heroin, conspiracy to supply cocaine and conspiracy to launder money at Inner London Crown Court.
Kyle Johnson, the singer's ex-boyfriend, was jailed for 12 years in 2009 for heroin possession with intent.
Police identified 26-year-old Kyle Johnson as the safe-house keeper and drug courier.
Campbell's jailing brings the total number of gang members imprisoned to 11.
The drugs were seized during raids at addresses in Forest Gate, Edmonton, Elephant and Castle, Wembley, and Hackney.
'Major criminal network'
Police said Campbell was the "kingpin" of the operation.
He was responsible for controlling and directing the sale of the drugs, with many of the other members referring to him as 'Uncle'.
The court heard Campbell enjoyed a lavish lifestyle, purchasing luxury cars including a Bentley, a Mercedes and an Audi S5.
He wore Rolex and Audemars Piguet watches valued at £62,500 and diamond-encrusted jewellery worth £88,000.
Officers recovered £120,000 in cash from his home.
Det Insp Colin Stephenson said: "This was one of the most significant drugs seizures by the Met in recent times and has seriously disrupted a major criminal network engaged in the wholesale supply of heroin and cocaine.
"The result is the culmination of a long-term and complex investigation which successfully removed a major consignment of class A drugs from the streets, and made a significant dent in the availability of heroin across the capital.
"Seizures of this scale prevent criminals from profiting and in turn, impact the wider harm that comes from the illegal drugs trade."