Input (grade 3): The remaining 105 locomotives were built by BREL at Doncaster Works (nos. 56031 to 56115) and Crewe Works (Nos. 56116 to 56135).
Output (grade 3): The remaining 105 locomotives were built by BREL at Doncaster Works (Nos. 56031 to 56115) and Crewe Works (Nos. 56116 to 56135).