Strategic Route 6 - North London Line and Thameside was the designation Network Rail gave to a grouping of railway lines in Greater London and the East of England region that encompassed the London, Tilbury and Southend Line and overground commuter lines within London.
[1] The Greater Anglia RUS includes a number of proposal for the future development of the route.
In the medium term, 2009–14, this plan includes minor infrastructure works and additional rolling stock to allow all main line peak-service trains to be extended to 12-car formation.
Also included is the proposal for the extension of platforms on the Tilbury loop and Ockendon branch to handle 12 cars, to allow all main line peak-service trains to be extended to 8 or 12-car formation.
In the longer term intentions are to continue the lengthening of peak trains to 12-car formation.