"The Oxford Companion to British Railway History" edited by Jack Simmons and Gordon Biddle, Oxford University Press
Steam : Britain's 1930's Luxury Expresses" by A.J. Mullay
"Encyclopaedia of British Railways" by Christopher Awdry
"The Trains We
Loved" by David St John Thomas and Patrick Whitehouse, David & Charles
"ABC British Locomotives 1944", Ian Allen Publishing, 2001
"Fowler Locomotives : A Pictorial History" by Brian Haresnape, Book Law Publications
"Stanier Locomotives : A Pictorial History"
by Brian Haresnape, Ian Allen Publishing
"Ivatt and Riddles Locomotives : A Pictorial History" by Brian Haresnape, Book Law Publications
"Sir William Stanier : A New Biography" by J E Chacksfield, The Oakwood Press.
"LMS 150" by Patrick Whitehouse & David St John
Thomas, David & Charles
"The Observer's Book of Railway Locomotives of Britain", revised and edited by H.C. Casserley, Frederick
Warne & Co. Ltd, 1961 edition
"The Power of the Royal Scots" by David Jenkinson, Oxford Publishing Co.
"The Power of the
8Fs" by Jeff Ryan, David McIntosh and George Moon, Oxford Publishing Co.
"The Duchesses" by Andrew Roden, Aurum Press, first
published in 2008
"A History of the LMS : Volumes 1-3" by O.S. Nock, Steam Past publications
"Duchess 75 : Mallard''s Greatest
Rival" by Robin Jones, Classic Magazines.
"Sir Henry Fowler KBE : A Henrician's Engineering Journey" , by John Kyte, A Vale of
Evesham Historical Society Publication, available from the Almonry Museum, Evesham
Steam World issues
173 & 174, "A Castle in Cumbria" by Keith Farr, published by Emap Active Ltd, November & December 2001.
I have referenced some internet pages, mainly to check the current status of preserved locomotives.