Ten years before the phasing out of steam on British railways in 1968, BR’s fleet numbered over 16,000 locomotives; some were as much as 80 years old when decommissioned and some almost new. Thanks to the preservation movement, there are now operational examples of about 150 different classes, but a large number are extinct. This comprehensive illustrated reference book provides detailed information about these lost engines, representing almost 350 classes and over 10,000 machines.