TFL are proposing changes to the 3 and N3 bus routes which pass through Lambeth.
They say:
"We propose to reroute the service to Russell Square serving Charing Cross Road and Great Russell Street. Buses would no longer run between Regent Street and Trafalgar Square.
Our proposals would create new passenger links between Millbank, the British Museum and the Russell Square area on route 3.
They would also create new links between Millbank and Tottenham Court Road station for easy access to Tube and Elizabeth line services.
There would be no change to frequencies. At the moment buses run between Crystal Palace bus station and Regent Street (Conduit Street) serving West Dulwich, Herne Hill, Brixton, Kennington and Westminster. Buses run every eight minutes during the day Monday to Saturday, and every ten minutes during the day on Sundays."
You can find further information here, as well as a link to the online consultation:
consultations.tfl.gov.uk/buses/bus-routes-3-137-and-n3/
The consultation closes on 29th January 2017.