The Class 50 Alliance Ltd owns four Class 50 (English Electric Type 4) diesel locomotives and operates a fifth which is owned by [[Class Fifty Operations Limited]]<ref>[http://www.svrlive.com/copy-of-news-211016-1-high-sherrif SVRLive]</ref>, in turn owned by a small number of its shareholders. The Class 50 Alliance Ltd was formed in 2013 by the merger of two groups, The Fifty Fund and Project Defiance.
The Alliance’s locomotives are: