This was in the End of the Line video. Look at the poor passengers craning their necks out the window to look. If that was me, I'd probably never want to get in an electric hauled train ever again! (Apparently although the cab ends were steel, the mid section tended to be made of aluminium - so you can imagine after a severe fire all that was left were the cab ends and a melted midriff, so off to the scrapyard.)
Aluminium body panels are easily replaced, even if melted; however for a fire to get hot enough to melt them it would have wrecked the metallurgical properties of steel components, so it would be a scrapper whatever.
I believe electric motive power has become a lot better since then, notwithstanding the odd rescue mission by a 60 year old diesel loco
