Certain common configurations acquired names, those most relevant to the SVR being:
*'''2-6-0''' Mogul (SVR domiciled examples include [[43106]] and [[7325]])
*'''2-6-2''' Prairie (SVR domiciled examples include [[4566]] and [[The 82045 Steam Locomotive Trust|82045]])
*'''4-6-2''' Pacific
Thus ‘Flying Scotsman’ would normally be referred to as an example of a Gresley Pacific, rather than a Gresley 4-6-2.