london underground train drivers earn over £40,000 per annum. the training period is 22 weeks and is done solely in house.
the best way for you to get a job driving a train is firstly get a position within LUL (type in TFL vacancies to your search engine). and then you can apply internally once you are in any position within the underground.
the job is the hardest to get on the underground and the easiest to lose. internally there is waiting lists of over 18 months for staff waiting to train as drivers. it is a good gig if you can get used to the shifts, the massive responsibility and solitude of the job. the pay is now very good and you will remain on whatever salary you are on until you complete training (Station Assistant lowest grade is about £25,000 pa).
i do some work for tfl.