Time travel in aircraft
Ages ago I remember reading an article about Einstein's Theory of Relativity (I think), which illustrated a point about space and time with an example of a train driver on the London-Glasgow route. Over the course of his working life, back and forth, five days a week he would age something like eight minutes less than his wife, who stayed 'motionless' at home.
Can any physicists enlighten me on this in simple terms. If it's true, I'm going to go for long-haul!