Since the invention of the very first railway steam locomotive in 1804, railway companies have applied names to their locomotives, carriages and multiple units. Numbers have usually been applied too, but not always; the Great Western Railway only applied names to its own broad gauge locomotives (though numbers were given to such locomotives that it inherited from elsewhere).
Locomotive names have been inspired by a variety of topics over the two centuries of railway operation in the United Kingdom, and the principal themes are set out in the table below, together with some examples of locomotive classes where all or a large proportion carried such names. Two other types of thematic naming of locomotive classes have occurred:
References
Naming of British railway rolling stock Wikipedia(Text) CC BY-SA