They should have savings. Tube drivers in London earn a lot of money:
http://www.telegraph.co.uk/news/uknews/road-and-rail-transpo...
It's not a very skilled job.
http://www.telegraph.co.uk/news/uknews/road-and-rail-transpo...
It's not a very skilled job.
Also, in real life, train drivers are responsible for the safety of the passengers on the train, and also have to deal with the aftermath if anyone ends up being in front of the train.
If I was a train driver, I would like to be paid enough to cover all of that!
A family living in London with that income -- even if the second parent is also working -- is unlikely to have any savings. Unless the second family member has a high income information, tech, or finance job.