This book covers the design, construction, operation and performance of Sir William Stanier's masterpiece, the Princess Coronation pacific locomotives, better known as the 'Duchesses'. Included are pen portraits of the LMS engineers, a chapter on the express locomotives of the early LMS period that preceded their introduction and the internal rivalries and politics that Stanier was brought in to resolve. Chapters and photographs cover the streamline era, the war years and aftermath, the early years of nationalisation including the 1948 locomotive exchanges and the recovery of performance in the mid-1950s. The author includes some of his own experiences and photographs. The book includes 200 photographs including a few in colour from the LMS era, and an appendix with weight diagrams, and statistics of the locomotive construction and withdrawal, names, liveries, allocations and mileages. AUTHOR: David Maidment was a senior manager with British Railways, with widespread experience of railway operating on the Western and London Midland Regions culminating in the role of Head of Safety Policy for the BRB after the Clapham Junction train accident. He retired in 1996, was a Principal Railway Safety Consultant with International Risk Management Services from 1996 to 2001 and founded the Railway Children charity (www.railwaychildren.org.uk) in 1995. He was awarded the OBE for services to the rail industry in 1996 and is now a frequent speaker on both the charity and his railway career and author of four novels, two non-fiction works on street children and over eighteen books for Pen & Sword's locomotive portfolio series, the royalties from all being donated to the charity. 20 colour, 180 b/w illustrations