Colas Class 37s 37057 and 37116 Network Rail Test Train

A video shows Class 37 diesel locomotives 37057 and 37116 departing from the down goods loop at Chelmsford Station on the Great Eastern Main Line. The footage captures the locomotives as part of a Network Rail test train operation. Colas is listed as one of the operators involved, though no specific headcode information is available in the record.

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