A rail replacement bus service is now in operation and will be serving stations between Victoria and Brixton.
It will not be stopping at Green Park station.
More top news
Peter Barnett made hundreds of trips from his home in Oxfordshire to Marylebone station without paying the full fare.
Police say he may have attacked more children and urged them to come forward.
The suspect walked up to a Tesco employee and shoulder barged him to the ground before punching him repeatedly in the face.