page_title: British Rail Class 37
section_title: Preservation
hierarchical_section_title: British Rail Class 37 / Preservation
caption_attribution_description: British English: Class 37/9 37901 Mirlees Pioneer at Ropley. Numbering history: D6850, 37150 37901
context_page_description: The British Rail Class 37 is a diesel-electric locomotive. Also known as the English Electric Type 3, the Class was ordered as part of the British Rail modernisation plan. They were numbered in two series, D6600-D6608 and D6700-D6999.
  The Class 37 became a familiar sight on many parts of the British Rail network, in particular forming the main motive power for InterCity services in East Anglia and within Scotland. They also performed well on secondary and inter-regional services for many years. The Class 37s are known to some railway enthusiasts as "Tractors", a nickname due to the agricultural sound of the diesel engine of the locomotive.
context_section_description: Class 37 locomotives have proved to be very popular, with many examples saved for preservation on heritage railways or by enthusiast groups. Notable examples saved include the first-built locomotive, no. D6700, and the last built locomotive 37308. A number of the class have been sold back out of preservation to mainline operators including both Ruston-engined prototypes nos. 37906. One locomotive, 37372, has been procured by a group called the Baby Deltic Project, for conversion into a replica of a Class 23 Baby Deltic.
caption: 37901 Mirrlees Pioneer
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