Desiro stock shouldn’t be possible to run with reds on the front with a key on. 458s on the other hand I’m not sure on.
I’ve seen several 377s with tails on the front, usually after terminating short and the driver rushing to open up the cab (although that could be classed as subjective).
There was an incident recently, I believe during a strike, where a unit left a terminus with whites on the tail, the driver IC’d the contingency guard and asked them to flick the whites to red, but the guard refused. Driver had to key off, walk formation and change the lights. Caused quite a big TIN if I remember.