There is a universal signal system that applies through the UK, to which all NR drivers follow. However, routes and traction are not universal, hence why thorough route knowledge and traction knowledge is key.
On the routes they're competent, drivers know EVERY station stopping position, every change of permissible speed, every signal and junction and to where those junctions can take them with all the associated indications, every curve, every gradient, every level crossing, every tunnel, location of every telephone (SPT, ECO etc) and which ones are safe to use, every cutting or bridge, where it's safe to do an uncontrolled evacuation, where you can not evacuate, every mile post, every access gate, where conductor rails or OHLE equipment is etc, where services are on adjacent lines and from which direction they will be coming. If I derail at night in thick fog, I am expected to know immediately where I am and give a location, I am expected to protect the adjacent lines by attaching Track Circuit Operating Clips, if I don't have enough, I need to quickly judge which line is most likely to have a train coming first. If I can't get through on the Cab Radio for some reason, I am expected to know immediately where the nearest signal is and head for it to use the attached telephone. If there is third rail, I am expected to know immediately that I am isolating the correct rails and not over a section gap that would make half the train remain live etc.
If you're in a plane and you have a problem, you can get ATC to give you vectors to the nearest suitable airfield. Train drivers in the middle of nowhere do not have that luxury. You just can't compare.
Passengers in stations only see our faces staring straight ahead as we pull in. They don't see us staring at the stop board at the end of the platform, remembering how many coaches we have and which board to stop at, they don't see our hand moving bringing the train to a smooth stop, whilst our brains are computing how to do so on a downhill gradient in icy conditions with idiots pretending to jump in front of our train, with it being the 100th time we've stopped that day! We don't have an autopilot, we can't just "monitor things" whilst in cruise. We are having to maintain 100% concentration throughout an entire shift.
I do wish the public and media would stop trashing train drivers if they don't know what we do or what we're trained to do. "They just push buttons", nope the public making wild assumptions about an industry they have no knowledge about are the ones pushing buttons.....ours!