“County Lines” is the term given to the organised supply of illegal drugs from major urban centres. The phenomenon is well explained on the National Crime Agency website https://www.nationalcrimeagency.gov.uk/what-we-do/crime-threats/drug-trafficking/county-lines
Such cases are inherently serious. Anyone convicted of playing a major role faces a lengthy custodial sentence, although someone playing only a very minor part may avoid custody.
These cases often involve the enforced participation of children and other vulnerable people, who may be victims of slavery and human trafficking. The law provides defences for those whose participation was truly involuntary.
Clearly anyone suspected of a “County Lines” offence faces a potentially very serious situation, and should seek legal advice without delay.