A number of engineers trained at or worked for the GWR, before moving to other companies including Archibald Sturrock (GNR),[144] Thomas Russell Crampton (SER among others),[144] James Holden (GER),[144] Harold Holcroft (SECR, SR),[144] William Stanier (LMS),[144] William Stroudley (HR, LBSCR).[145]