class numbers in the s was under tops reserved for electro diesels or for dc diesels empirically the woodhead locos do indeed suggest that the series vs the series was for indeed for dc locos catenary or rd rail however i've never seen it claimed that this was particularly deliberate whilst i have read that the electro diesels were deliberately grouped in this range does anyone have a robust source in the meantime i've reverted the change mostly to avoid the redlink if we do change this the link ought to point to a section within the tops article