County lines drug dealing has extended the reach of Leyton gangs beyond their traditional territories into smaller towns.

As London's drug markets have become saturated, gangs from areas like Leyton have expanded their operations through county lines—a network of drug distribution linking urban gangs with rural or smaller urban markets. This expansion is driven by profit and has altered gang dynamics, making them more business-like and less territorial in the traditional sense. It also increases the risks for young people involved in these operations, who often face exploitation and violence away from their home areas.