Various heavy duty cranes, usually referred to as breakdown cranes, with runners etc. Some were converted from steam to diesel power. If you are interested in such cranes the definitive history has been published as
Tatlow, Peter (2012) Railway Breakdown Cranes: Volume 1 The Story of Steam Breakdown Cranes on the Railways of Britain. Publ. Noodle Books by Kevin Robertson ISBN 13: 9781906419691. 256 pages.
Tatlow, Peter (2013) Railway Breakdown Cranes: Volume 2 The Story of Breakdown Cranes on the Railways of Britain. Publ. Noodle Books by Kevin Robertson ISBN 13: 978190641997-4. 296 pages. There is a group for them The Breakdown Crane Association - go to http://www.bdca.org.uk/index.html
Keywords:BR Heavy Duty breakdown cranes, GWR Crane, LMS crane, LNER crane, Railway wagon, SR crane
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