Class 22

North British Type 2 diesel-hydraulic design for the Western Region. Eventually totaling 58 machines, their non-standard transmission deemed them for early withdrawal; 6338 & 6339 becoming the last examples remaining in traffic.

Engine: NBL/MAN 12cyl L12V18/21M of 1100hp.

Numbers: D6300-D6357 (no TOPS numbers carried.