I haven't mentioned anything about a dispute... my question was is the level of training a legal requirement or is it due to union agreements. And perhaps if people didn't keep on wilfully misreading my question for their own personal agenda I wouldn't have to re- ask the question would I?
Having competent route knowledge is a legal requirement.
How much time is given is an agreement between the union and TOC.
In all the route learning I have undertaken, the time given has always been the right amount without feeling either rushed, or twiddling thumbs being ready early - so there are no "unreasonable demands."
Unfortunately, in many industries, training is given which is 'as little as can be got away with' or less. The union's involvement protects drivers and ensures it is sufficient.
The time given (by agreement) to learning a route will take into account the complexity of the route. Route Learning not only involves learning the myriad of line speeds, crossover speeds, what length of train platforms can hold (can be different lengths for different platforms at the same station), but also what risks there are. There maybe a signal where when there is a train on an adjacent line, it gets hidden behind it, and you can read across to another line's signal. You may have a platform where the stop marker is right up against the signal making it out of sight.
There may be places where the signal is hidden amongst the overhead wires, or behind an overbridge and you can read through to the next signal, which is for the train in front of you (particularly if it's dark and there's a dip in the track where you could lose sight of the train in front and it's taillights).
You'll need to know about those risks on the route you drive.
As an example: If you were driving a train from Kings Cross to Cambridge and stopping at Hitchin, and you leave Stevenage on the fast line, where do you NOT want a green signal? If you get a green you're being routed the wrong way.
What if you aren't stopping at Hitchin, what then? How does that change things?
What if you get a special stop order on a train you're driving? Some stations only have platforms on certain lines, so you'll need to know where the last place you can cross lines is for the extra station you are to stop at, and what indications you need on the signals - because the Signaller might not have been told about your additional stop.
There's a lot more to route knowledge than most people realise, and completely different to driving a bus. For the record, I strongly believe bus drivers should be paid more than they are currently, and it is interesting to observe that in New York City where a large amount of the bus service is provided by the publically owned Transit Authority, and a Trade Union is present which has more influence than bus drivers unions here in the UK, that their pay is similar to Train Operators on the Subway.
Someone else said above that comparing bus driving and train driving is like comparing apples and oranges. It's true - apart from carrying responsibility and having unsocial hours, they are very different. And the same goes for comparisons with pilots as well.