Introduced to service as D212 in May 1959 and the third of the production series to be delivered, 'Aureol' was officially named in 1960. By 1974 when the locomotive was re-numbered 40012 under TOPS the locomotive's nameplates had been removed, yet despite this the locomotive's name was painted onto the bodyside before 1985 withdrawal. Reinstated in 1985 to assist with the re-modelling of Crewe Station, restricted to a top speed of 35mph, and given the departmental number 97407.