Kieren Fallon has been rebailed until March next year after spending the day being questioned by police.
The six-times champion jockey arrived at Bishopsgate police station with his legal representative earlier in the day to answer bail in connection with allegations of race fixing.
A spokesman for City of London Police said: “The person returned on bail today has now been bailed to early next year.”
Fallon left the station from a rear entrance just after 7.15pm in a black Volkswagen people carrier with blacked-out windows, and surrounded by associates.