303, and 304 all remain operational as of August 2022. 97301 is currently stored at Derby RTC. Preservation Class 37 locomotives have proved to be very popular, with many examples saved for preservation on heritage railways as well 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. 37905/6. 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. Models In 1965 Hornby Railways launched its first version of the BR Class 37 in OO gauge. See also Passenger locomotives in use in the UK BR Class 37 renumbering References Preserved locomotives Sources Further reading External links The Class 37 Locomotive Group Owners of 37003 The Growler Group Class 37 37215, 37248 (custodians) 37 Co-Co locomotives English Electric locomotives Vulcan Foundry locomotives Robert Stephenson and Hawthorns locomotives Railway locomotives introduced in 1960 Diesel-electric locomotives of Great Britain Standard gauge locomotives of Great Britain Co'Co' Diesel Locomotives of Europe