BR Western Region (Swindon)

'BR Western Region (Swindon)' is used in this encyclopedia where a Western Region locomotive class was designed under Region engineering authority but built by a private contractor, distinct from in-house construction at BR Swindon Works itself. The Region's preference in the late 1950s and early 1960s for German-licensed diesel-hydraulic transmissions over BR-standard diesel-electric was a notable engineering policy of this office.