The London, Tilbury and Southend Railway (LTSR), also known as Essex Thameside, is a commuter railway line on the British railway system which connects Fenchurch Street station in central London with destinations in east London and Essex, including Barking, Upminster, Basildon, Grays, Tilbury, Southend and Shoeburyness. The line forms part of Network Rail's strategic route 6. It is classified as a London and South East commuter line. Passenger services form the Essex Thameside franchise that is currently operated by c2c, a train operating company that is part of the National Express Group.