Addiction Treatment Southend-on-sea, Southend - Welcome to the Southend-on-sea Addiction Treatment Directory listing recommended addiction consultants in Southend-on-sea. It lists those who offer help with addiction and addiction treatment in Southend-on-sea, Southend. Do you have a Southend-on-sea business? If so, why not advertise it on the Southend-on-sea Business Directory - IT'S FREE.