Recent changes have seen some fares increase by as much as 38%, a hike all parties on the London Assembly say disadvantage outer Londoners.
Boris Johnson has been accused of losing control of his administration after policing deputy Stephen Greenhalgh promised to cut fares if elected as Mayor.
Earlier this month the off-peak zone 1-5 cap was increased from £8.50 to £10.90 while passengers travelling to and from zone 6 will pay £11.70 per day.
Danny Alexander, Chief Secretary to the Treasury, has written to the Mayor seeking assurances that he’ll pass the saving, which reduces operating costs for bus companies, on to passengers “as quickly as possible.”
London’s bus and Tube passengers face years of further fares increases under funding plans due to be agreed by the Transport for London board next week.