Kieren Fallon and Robert Winston are set to learn today if they will face charges in Britain’s biggest horse racing corruption investigation.
The pair are among a total of 28 people due to answer bail at Bishopsgate police station in the City of London as part of an inquiry into alleged race-fixing.
Other riders due to answer bail include Fergal Lynch, Darren Williams, Paul Bradley and amateur jockey Dale Jewett.
Trainers Alan Berry and Karl Burke have also been arrested as part of the inquiry.
The police investigation – codenamed Operation Crypton – has been hanging over the sport for more than two years.
The inquiry has been looking at more than 80 races and more than 130 officers have worked on the case.
At least 19 addresses have been raided.
The police swoops followed irregular betting on the internet exchange Betfair.
Betfair passed records from its sophisticated tracking of betting patterns to the Jockey Club, now known as the Horseracing Regulatory Authority.
They in turn called in the City of London police, who have the country’s largest financial fraud investigation team.