Most of it is connected to Glasgow.
Mark Richardson ran a firm that were major narcotics suppliers in Edinburgh. He is connected to the Daniel family of North Glasgow.
A lot of times you also have Glasgow born criminals setting up shop in Edinburgh. Martin Hamilton from East Glasgow for instance tried to become a major player in the Edinburgh drug trade. He was an extremely disturbed individual who was basically part gangland figure and part serial rapist. His erratic behavior led to him becoming a target of a few major Glasgow firms so he started sourcing his drugs from a Liverpool firm. Supposedly he was taking liberties with the Liverpool firm as well so they tortured him (he got stabbed multiple times), shot him in the head and dismembered him.
