Technical data and information has mainly come from the following publications:
Brown, David, Southern Electric (2 volumes) (Harrow Weald:Capital Transport, 2010)
Conner, Piers, The London Underground Electric Train (Ramsbury:Crowood, 2015)
Hardy, Brian, Tube Trains on the Isle of Wight (Harrow Weald:Capital Transport, 2003)
Haresnape, Brian & Swain, Alec, British Rail Fleet Survey (11 volumes) (Hersham:Ian Allan, 1981-1990)
Jennison, John & Sheffield, Tony, Diesel Hydraulics in the 1960s and 1970s (Hersham:Ian Allan, 2014)
King, Ray, British Industrial Diesel Locomotives (Diss:Barkers, 2006)
Marsden, Colin J., DMU and EMU Recognition Guide (Hersham:Ian Allan, 2013)
Marsden, Colin J., Traction Recognition (Second Edition) (Hersham:Ian Allan, 2009)
Morrison, Gavin, AC Electric Locomotives (Hersham:Ian Allan, 2013)
Muldoon, Ben, London Underground Rolling Stock Guide (Hersham:Ian Allan, 2014)
Vickers, R.L., DC Electric Trains and Locomotives in the British Isles (Newton Abbot:David & Charles, 1986)
plus periodicals such as Underground News, Modern Locomotives Illustrated and Railways Illustrated.