c2c operates services on the London , Tilbury and Southend Railway line from London Fenchurch Street to the northern Thames Gateway area of southern Essex , including Grays , Leigh-on-Sea and Southend-on-Sea .
It provides passenger rail services on the London , Tilbury and Southend Railway line from Fenchurch Street railway station in the City of London to the northern Thames Gateway area of southern Essex including Grays and Southend-on-Sea .