Eight people are due to be sentenced at Preston Crown Court on Friday following a major investigation into the supply and distribution of heroin from West Yorkshire to Morecambe.
The probe took place between February 2011 and May 2011.
Among those to be sentenced are: Angela Pinwanee Dixon, 26 of Halton Court, Morecambe, who pleaded guilty to conspiracy to supply class A drugs (heroin) and possession of cannabis.
Joshua Marshall, 41 of Albert Road, Morecambe, pleaded guilty to conspiracy to supply class A drugs and possession of cannabis.
Lisa Marshall, 27 of Albert Road, Morecambe, pleaded guilty to conspiracy to supply class A drugs.
Richard McCrum, 27 of Albert Road, Morecambe, pleaded guilty to conspiracy to supply class A drugs and possession of amphetamine.
And Richard Smith, 35 of Fairhaven Way, Morecambe, pleaded guilty to conspiracy to supply class A drugs.
Also to be sentenced are Majid Raj, 34 of Swallow Street, Keighley, who pleaded guilty to two counts of conspiracy to supply class A drugs, and Amjid Raj, 35 also of Swallow Street, Keighley, pleaded guilty to two counts of conspiracy to supply.