First Great Eastern was an award winning train operating company (TOC) that operated suburban, local and medium distance train services from London Liverpool Street via Romford to Essex and Ipswich in the United Kingdom on the Great Eastern Main Line (GEML) railway.
First Group gained the Great Eastern franchise in 1997 as part of the Privatisation of British Rail. In 2003, as part of a franchise reorganisation planned by the then Strategic Rail Authority, the Great Eastern was to be merged to form a 'Greater Anglia' franchise. This new contract was won by National Express Group who took over First Great Eastern operations on April 1, 2004 using the brand name 'one', which has since been rebranded as National Express East Anglia.
|Class 312||electric multiple unit||90||145||24||1966-70|
|Class 315||electric multiple unit||75||120||61||1979-1980|
|Class 321||electric multiple unit||100||160||77||1986-88|
|Class 360 Desiro||electric multiple unit||100||160||21||2002 - 2003|
A diesel multiple unit (DMU), was used on the Sudbury-Marks Tey branch line due to the lack of electrification, a Class 150 Sprinter, was used on weekdays and a Class 153 Sprinter at weekends. This was an unspecified unit from the Anglia Railways fleet based at Norwich, swapped daily.