If she had done this on a plane, she would have immediately been restrained by the crew, the plane would be diverted to the nearest available airport if it was in the air where the local authorities would arrest and charge her. The best she could hope for in these circumstances would be a hefty fine to cover the full cost of the delay caused, which in the case of a flight would be tens or even hundreds of thousands of pounds.
I think this comparison is not exactly helpful.
If a marauder breaks into the flight deck of a 'plane in flight, if he then incapacitates the pilots or damages the controls, the 'plane won't be able to land safely and likely everyone on board will die, and maybe people on the ground too.
If a marauder attacks a bus driver when the bus is in motion, the passengers, drivers and passengers of other vehicles and pedestrians may be injured or killed.
If a marauder breaks into the cab of a train in motion, if he then incapacitates the driver or damages the controls, the train will likely come to a halt fairly quickly and no-one will be injured or killed.
So it's quite logical that the penalties for the 'plane situation are much more severe than the other two.
I suspect bus drivers are routinely threatened every evening in this country and have to keep on driving, with the perpetrators not getting the kind of police interest that the lady in this case has garnered.
A railway employee if attacked is trained to retreat to a place of safety, on board a train that's the driving cabs.
I can't help thinking that the lowly passenger has no such place of refuge. If any drivers here hear someone banging furiously on their door, yelling "let me in!", I hope they try and ascertain whether it might be a passenger trying to escape from a nutter, and not necessarily the nutter himself...
And just to make it clear -
I'm not condoning anything.