The drugs gang responsible for bringing in more than £1 million in class A drugs to Grantham have been jailed for a combined total of more than 110 years.
Twelve men will serve between two years and four months and 16 years behind bars after sentencing by Judge John Pini QC at Lincoln Crown Court.
Ringleader Jonathan Ferry got a 16-year-sentence - as did James Straw.
The organised crime gang had flooded Grantham with drugs brought more than £1 million worth of heroin and cocaine into the town in just nine months, the court had been told.
During a nine-week trial, it was alleged that the gang, headed up by car dealer Jonathan Ferry, also brought in significant amounts of both M Cat and amphetamine and was set to make vast profits from their illegal activities.
Drugs were couriered in from Manchester and Nottinghamshire as a result of links made between the Grantham gang and other organised crime groups.
Matthew Lowe, prosecuting, said: "This case arises from the organised supply of class A and class B drugs that took place in the East Midlands.
"There was an established organised crime group based in Grantham. They purchased drugs in substantial quantities, in particular cocaine and heroin, from organised crime groups based in Manchester and Nottinghamshire.
"The Grantham group was headed up by Jonathan Ferry. He was an established class A drug dealer. He was the head of the criminal operation in Grantham sufficiently well established in his trade so that he was able to obtain the supply of heroin and cocaine in significant quantities.
"By January of 2014 the Grantham crime group was fully operating. When members of the group were arrested Ferry was able to recruit replacements with little interruption to his operation."
Mr Lowe said that Ferry kept himself at "arms distance" from much of the drug dealing.
The court was told that police seized vast quantities of drugs during a series of raids but the gang was so well organised it simply carried on its operations with cocaine and M Cat being supplied from Manchester and heroin and amphetamine from North Nottinghamshire.
Tyrone Sly, 46, of Bye Path Road, Retford, got a 10 years and 6 months sentence, Straw, 50, of Petersmith Drive, New Ollerton, Newark, got 16 years while Ferry, 46, of Larch Close, Grantham, was jailed for 16 years.
Paul Hull, 47, of Grantley Street, Grantham, was jailed for 12 years, Adam Higgs, 24, of Shaw Road, Grantham, received 14 years, Luke Smith, 30, of Goulden Street, Salford, was sentenced to 8 years' jail and Ryan Anderson, 31, of Walmer Street, Gorton, Manchester, got 8 years.
Stuart Frazier, 54, of Princess Drive, Grantham and Jamie Darby, 39, of Princess Drive, Grantham; each got 10 years behind bars; Adam Gill, 29 , of South Parade, Grantham, 3 years 6 months; Martin Cooper,31, formerly of Grantham; 3 years 6 months; and Ashley Toulson, 27, of Edward Street, Grantham; 2 years and 4 months.
Straw, Frazier, Darby, and Gill had all denied charges of conspiracy to supply drugs between January 1 and October 23 2014.
Ferry, 46, of Larch Close, Grantham; Paul Hull, 47, of Grantley Street, Grantham; Adam Higgs, 24, of Shaw Road, Grantham; Ashley Toulson, 27, of Edward Street, Grantham; Tyrone Sly, 45, of Bye Path Road, Retford; Ryan Anderson, 30, of Walmer Street, Gorton, Manchester; Martin Cooper,30, formerly of Grantham; Francesca Moynihan ,22, of Hawthorn Drive, Salford; and Luke Smith, 30, of Goulden Street, Salford; all admitted their parts in the crimes.
The 13th defendant, Francesca Moynihan, was sentenced to 12 months imprisonment suspended for two years with 120 hours of unpaid work in the community.
Judge John Pini QC, passing sentence, described car dealer Jonathan Ferry as head of the Grantham drugs gang with Adam Higgs as his right-hand man.
The judge said: "Ferry was at the very heart of this operation which he controlled.
"He played an organising role in the buying and selling of drugs. He expected and no doubt got substantial financial gain.
"He drove a Ranger Rover with a personalised number plate. Found at his address was a receipt indicating he had bought it for £23,500 paying with cash.
"And he had gold jewellery, a quantity of cash. There were four Rolex watches and two Armani watches.
"Ferry had a reputation in Grantham as an established drug dealer. He played a leading role and was very important in this operation."
Turning to Higgs, the judge said "He played an extremely important role. It was a leading role but under Ferry's direction. Higgs was, I am sure, Ferry's right -hand man."
The judge said Paul Hull was another of the leading members of the drugs operation.
"He was a trusted courier who was in close contact with Ferry, Higgs, Straw and Sly. He played an extremely significant role."
The judge added that Straw and Sly, based in the Retford and Ollerton areas, operated as a partnership and were also key members of the conspiracy while other defendants played lesser roles either as couriers or through involvement in processing drugs ready for onward sale.
At the end of the case the judge praised the police team involved in investigating the case.
He said: "This has been the result of a great many painstaking and diligent hours of police work. The officers and all involved are to be commended."
Anthony Morton, 27, of Tamar Court, Grantham; denied conspiracy to supply heroin and was found not guilty by the jury
