Strategic Route 7 - Great Eastern is the designation given by Network Rail to a grouping of railway lines in the East of England that encompasses the Great Eastern Main Line and its various branch lines. The route services the regional centers of Colchester, Ipswich and Norwich as well as the ports of Felixstowe and Harwich. 
The Route is divided into a number of separate Strategic Route Sections (SRS's) that are defined based on route use, infrastructure and historical lines.
|Route||Strategic Route Sections (SRS)||Corresponding historical lines (whole & partial)|
|Route 7 - Great Eastern||07.01 - Liverpool Street – Shenfield||Great Eastern Main Line|
|07.02 - Shenfield – Ipswich||Great Eastern Main Line|
|07.03 - Ipswich – Norwich||Great Eastern Main Line|
|07.04 - Freight Lines||freight only lines within area covered|
|07.05 - Shenfield – Southend Victoria/Southminster||Crouch Valley Line, Shenfield to Southend Line|
|07.06 - Braintree Branch||Braintree Branch Line|
|07.07 - Harwich Branch||Mayflower Line|
|07.08 - Walton and Clacton Branches||Sunshine Coast Line|
|07.09 - Romford – Upminster||Romford to Upminster Line|
|07.10 - Sudbury to Marks Tey||Gainsborough Line|
|07.11 - East Suffolk line and Norfolk Branches||Bittern Line, East Suffolk Line, Wherry Lines|
|07.12 - Felixstowe – Ipswich Yard||Felixstowe Branch Line|
The Greater Anglia RUS includes a number of proposals for the future development of the route. In the medium term, 2009-14, this includes minor infrastructure works and additional rolling stock to allow main line peak-service trains to be extended to 12-car formation. Also included is the proposal for the extension of platforms at Stratford 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. Enhancements to the power supply of the route are intended for completion by 2012 to interface with those carried out on Route 5 and Route 6.