As E850 Lord Nelson, with an indicator shelter for prototype testing, circa 1926-1927
Southern Railway (SR) No. 850 Lord Nelson (originally E850, BR no. 30850) is a preserved British steam locomotive of the Lord Nelson class. She forms part of the United Kingdom's National Railway Collection.
The Southern Railway became part of British Railways (BR) in 1948 through nationalisation, and was renumbered 30850. Under BR the class were given the power classification 7P. She was withdrawn in August 1962. She was preserved as part of the National Railway Collection, and is the sole survivor of the class. She has run in preservation, including on the main line, where her TOPS number is 98750. Her boiler certification expired in 2015.