Complex sentence: Cravens Railway Carriage and Wagon Company Limited was a railway car builder in Sheffield, England and supplier of the London Underground A60 Stock; and diesel multiple units and electric multiple units to British Railways.
Split into simpler sentences: Cravens Railway Carriage and Wagon Company Limited was a railway car builder in Sheffield, England. Cravens built the London Underground A60 Stock and diesel multiple units and electric multiple units for British Railways.