Folded bicycles can be taken free of charge on the tube at all times.
Non-folding bicycles can be taken free of charge on some sections of the tube outside peak times. Peak times are 07.30 - 09.30 and 16.00 - 19.00, Monday to Friday, except for public holidays.
In certain cases non-folding bicycles may also be taken during peak hours in the opposite direction to the majority of travelers. This includes the following sections of the Northern Line near Middlesex University:
The same rules apply for DLR (except Bank station), most Overground services and TfL Rail.
River services also take bikes as does the Emirates Air Line.