City Hall and London Underground say the continued take-up of Oyster and growing popularity of contactless fares means the offices are no longer needed.
TravelWatch says Tube bosses have failed to properly explain proposals to axe ticket offices and move staff into ticket halls and onto platforms.
The RMT union has announced a 48 hour Tube strike next week as part of its ongoing action in protest at ticket office closures and resulting job losses.
According to Labour, “more than half” of all visible staff at Baron’s Court, Edgware, Kilburn, East Ham and Hammersmith stations would disappear under LU’s plans.
London TravelWatch, the capital’s passenger watchdog is asking Tube users for their views on London Underground’s plans to close all ticket offices on the network.