London Mayor Sadiq Khan has backed an extension of the line from Elephant & Castle, which if built would end in Lewisham.
Although full funding for the project is yet to be secured, TfL has previously revealed details about the potential route, including where new stations might be built.
Here is everything you need to know about the extension, which might soon transform transport connections in south east London.
Where would the extension go?
Expected to cost as much as £8 billion to complete, new stations would be built at Burgess Park, Old Kent Road, New Cross Gate and Lewisham.
A new ticket hall and new platforms would also be built at Elephant & Castle station.
A further extension into Bromley has also been suggested by TfL in the past.
This additional extension would make use of existing track, and would replace the Southeastern services that currently use the line.
This would see Bakerloo line trains stop at Ladywell, Catford Bridge, Lower Sydenham, New Beckenham, Beckenham Junction, Clock House, Elmers End, Eden Park, West Wickham and Hayes.
Why is the extension needed?
London Mayor Sadiq Khan has said that at least 20,400 new homes could be built if Tube services were run to Lewisham.
The extension also aims to improve journey times for passengers and offer better connections within south east London and into the city centre.
How often would trains come?
A Freedom of Information request published by TfL earlier this year revealed the potential service pattern of the Bakerloo line if an extension is built.
There would be 27 trains per hour on the core section of the line between Queen’s Park and Lewisham, with at least 18 trains per hour extended south of Lewisham onto the Hayes branch.
Of these, at least 12 trains per hour would serve Hayes, with the remaining six trains per hour serving Beckenham Junction.
This would provide a train at least every five minutes from Hayes and every ten minutes from Beckenham Junction.
When will trains start running?
The land where the Bakerloo line extension will be built has already been safeguarded to prevent development that might impact it in the future.
Funding from the Government is needed if new track is to be built, but this is yet to be secured.
Still, TfL believes that construction could begin in the 2030s with trains potentially running as early as 2040.
