Commuters heading back to work after the Christmas break will see above-inflation fare increases.
Tube and bus journeys will cost an extra 4 per cent, and users of Boris bikes will see hire charges doubled from £1 to £2 a day.
But with some non-season-ticket unregulated fares allowed to be increased by an unlimited amount,
Railfuture said that some fares could be going up by around 11% or 12%.
Bob Crow, leader of the RMT transport union, said: ""When passengers get another inflation-busting kick in the teeth on January 2, they will know that their hard-earned cash is being bled out of the railways and into the pockets of a bunch of spivs and chancers."