Jubilee Line?
Am not a London resident, and have just re-watched the first episode of this magnificent series.
Sonia Baker supposedly goes under a train on the Jubilee Line. Is that possible? Many of the JL stations, including Westminster, have doors between the platform and the tracks that open only when the train is in the station and its doors are open. Therefore, on such stations, you can't fall, jump or be pushed under a JL train (only into one).
Is that true of all stations on the Jubilee Line?