Gyles Parkin is the 27th person to have been arrested and bailed, including former champion jockey Kieren Fallon.

Fallon, fellow jockeys Fergal Lynch and Darren Williams and trainer Karl Burke, were freed on bail in September.

And trainer Alan Berry and jockeys Paul Bradley and Robert Winston have since been questioned by police and bailed.

Parkin, 32 on Tuesday, was arrested on suspicion of conspiracy to defraud and picked up in the Scarborough area of North Yorkshire.

After being questioned by police, he was released on bail until May.

I have been reliably informed by a number of people that it is him Richard Hale Parkin's agent

His biggest career win came in 1996 when he rode Bollin Joanne to victory in the Coral Sprint Trophy at York.

But Parkin injured his neck and spine in a fall in June 2002, before returning to competition in 2003 and riding 11 winners last season.

Parkin's agent Richard Hale said earlier: "I haven't spoken to Gyles, but he hasn't been riding for a while as his shoulder has been bothering him. He was preparing for the coming season."

During the investigation into alleged race-fixing, more than 130 police officers previously raided 19 addresses across Suffolk, North Yorkshire, South Yorkshire and Hertfordshire.

Police are analysing more than 1,000 exhibits, including 59 phones and several computers.

The inquiry is examining allegations of fixing involving more than 80 races over the last two years.