You may be thinking 85s because they looked a bit like an 80 , sort of , and were painted similar colours .From my memory there was some confusion and a couple of problems with the directing the 85's into unwired roads, & as 2LaGrange mentions there was a couple of the 85's fitted with an illuminated E for identification purposes.
The problem stemmed from the decision to locate the Marker lights to above the windscreens starting from the 80cl, and then following that with the 85 and then the 86's. While the front on appearances were similar, there was enough subtle differences to distinguish the 3 classes apart in the daylight hours, but at Night, that was where the primary problems came about as the marker lights, were pretty well in the same spot in each case, likewise the splitting of the headlight bulbs to either side attempted to make some difference as well.
Another aspect that came up was the use of what is now called ditch lights and they are seemingly left on at all times from what I have observed over the years. Thing was when they first came out, on the 80 & 81classes, they were only ever classed as Fog lights, and in the main were only used for that purpose, owing there not being the reflective glare in fogs when only the main headlights were used, the lower fitted fog lights cut through fog without the same amount of reflective glare.
Another aspect that enginemen in those earlier days, would mostly turn the headlights down to dim where there was roads running alongside the line when cars approaching were seen, I do not see that happening these days.