This is the tenth book by David Maidment in the Locomotive Portfolio' series and covers the large number of designs from 1860 onwards of 0-6-0 saddle tanks built for both the Great Western Railway and the independent railway companies in South Wales, most of which were converted to pannier tanks in the Churchward and Collett eras as they were reboilered with raised Belpaire fireboxes between the early 1900s and the late 1920s. As well as the Armstrong and Dean engines, the book goes on to describe the design, construction and operation of the largest class of steam engines built in the UK in the last century - Collett's familiar 57XX class, examples of which were still being built after nationalisation. Collett also designed pannier tank engines for branch passenger and freight work - the 54,64 & 74XX series, and Hawksworth continued the GW tradition with a tapered boiler version, the 94XX, after the Second World War as well as the light 16XX and the outside cylinder Walschaerts valve geared 15XX. This is a very comprehensive book covering so many classes, valuable for the modeller, and has over 400 photographs, over 50 in colour. 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.co.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 ten books for Pen & Sword's locomotive portfolio series, the royalties from all being donated to the charity. 300 colour and b/w illustrations, weight diagrams