We ' re going to build a firewall and it ' s going to be magnificent . And if you disagree we ' re going to lock you up crooked uoutrageouslysmart <| sep |> It is a long term plan , along with upgrading signalling to actually work with grade 4 automated trains . But longterm here isn ' t just a decade , we ' re talking almost half a century , give or take the economy which is currently on the verge of tanking . Part of the problem is that large chunks of the underground would need to be gutted and rebuilt . Like the report highlighted that some stretches of the Bakerloo tunnel are built in such a way that all communication to central control is completely blocked which currently would be highly dangerous in an automated situation . With regard to platform doors , you have to deal with some stations have weird shapes see Bank .