The Sex Discrimination Act 1975 removed this barrier, and many women applied to become Tube train drivers.

Instead of completing her training in the usual way, she was asked to stay off work for a few days to allow staff at 55 Broadway (London Transport's head office) time to organise a press conference.

"[10] Dadds worked as a driver with the London Underground until she took early retirement in 1993, after which she moved to Spain.

[2][4] The London Transport Museum made an oral history recording with Dadds in 1993 in which she described her career.

Speaking after her death, Howard Collins, chief executive of London Underground, said: "Hannah Dadds changed the working life of women on the Tube and the way in which many people viewed Tube drivers" and that "She was an esteemed member of our workforce.