Network South East
Network South East (NSE) was a brand of British Rail between 1986 and 1997. Network South East ran services in the London & south Eastern area of the UK.
Thames & Chiltern
Chiltern Main Line
The Chiltern Main Linebrand is for services which started at or ended at London Marylebone.
Thames Valley
South Western
The Network South East, South Western sector was for services out of London Waterloo. [1]
Island Line
South Central
Gatwick Express
Gatwick Express was unusal for Network South East as it was operated by Intercity with the Class 73 locomotive and Class 488 carriages
Thameslink
South Eastern
Anglia
Stanstead Express
North
Rolling Stock
Network South East inherited the classes from British Rail,
Network South East introduced there own stock in two Family's
Networker
The Networker family was new built fleet to replace the out of date slam door stock. The Class 165, Class 166, Class 365, Class 465 and Class 466
Mark 3
The Mark 3 is units which are developed from the Mark 3 coach. Network South East ordered the Class 321 and Class 442.
Tube

Network South East operated the Waterloo & City Line using the Class 487 which were replaced by the Class 482, in addition to the Waterloo & City Line they also operated the Island Line with the Class 485 & 486 which were replaced by the Class 483.
Legacy
In March 2025 Southeastern repainted Class 465, 465908 Chris Green OBE into Network South East Toothpasta livery.

Network South East history is celebrated by the Friends of Network South East.