 Operational livery was ex-works photographic grey with red and white lining. The British Railways "Cycling Lion" crest was also used though, after the works photograph, this was painted over without explanation. Numbering was the British Railways standard system, in the 36001 series. If the class had gone into full production, the locomotives would have been painted in British Railways mixed traffic / freight black livery with red, grey and cream lining. 36001 was initially painted in this livery but this preceded the official works photograph and was subsequently repainted in photographic grey livery.
